diff --git a/source/blender/blenkernel/intern/fcurve_test.cc b/source/blender/blenkernel/intern/fcurve_test.cc
index 1912e3a9d8d..285c6a0af4d 100644
--- a/source/blender/blenkernel/intern/fcurve_test.cc
+++ b/source/blender/blenkernel/intern/fcurve_test.cc
@@ -7,7 +7,6 @@
 #include "BKE_fcurve.h"
 
 #include "ED_keyframing.h"
-#include "ED_types.h" /* For SELECT. */
 
 #include "DNA_anim_types.h"
 
diff --git a/source/blender/editors/animation/anim_markers.c b/source/blender/editors/animation/anim_markers.c
index e96e561c537..f1562fac7ee 100644
--- a/source/blender/editors/animation/anim_markers.c
+++ b/source/blender/editors/animation/anim_markers.c
@@ -51,7 +51,6 @@
 #include "ED_screen.h"
 #include "ED_select_utils.h"
 #include "ED_transform.h"
-#include "ED_types.h"
 #include "ED_util.h"
 
 #include "DEG_depsgraph.h"
diff --git a/source/blender/editors/curve/editcurve.c b/source/blender/editors/curve/editcurve.c
index b8c0ea42daa..2829e8bc115 100644
--- a/source/blender/editors/curve/editcurve.c
+++ b/source/blender/editors/curve/editcurve.c
@@ -47,7 +47,6 @@
 #include "ED_select_utils.h"
 #include "ED_transform.h"
 #include "ED_transform_snap_object_context.h"
-#include "ED_types.h"
 #include "ED_view3d.h"
 
 #include "curve_intern.h"
@@ -2088,7 +2087,7 @@ bool ed_editnurb_extrude_flag(EditNurb *editnurb, const uint8_t flag)
           const int copy_from = intvls_u[i - 1];
           const int copy_to = intvls_u[i];
           const int copy_count = copy_to - copy_from + 1;
-          const bool sel_status = selected_u || selected_v ? SELECT : DESELECT;
+          const bool sel_status = selected_u || selected_v ? true : false;
           ED_curve_bpcpy(editnurb, new_bp_u_v, old_bp_v + copy_from, copy_count);
           select_bpoints(new_bp_u_v, 1, copy_count, sel_status, flag, HIDDEN);
           new_bp_u_v += copy_count;
@@ -2154,7 +2153,7 @@ static void adduplicateflagNurb(
         starta = a;
         while ((bezt->f1 & flag) || (bezt->f2 & flag) || (bezt->f3 & flag)) {
           if (!split) {
-            select_beztriple(bezt, DESELECT, flag, HIDDEN);
+            select_beztriple(bezt, false, flag, HIDDEN);
           }
           enda = a;
           if (a >= nu->pntsu - 1) {
@@ -2194,7 +2193,7 @@ static void adduplicateflagNurb(
             }
 
             for (b = 0, bezt1 = newnu->bezt; b < newnu->pntsu; b++, bezt1++) {
-              select_beztriple(bezt1, SELECT, flag, HIDDEN);
+              select_beztriple(bezt1, true, flag, HIDDEN);
             }
 
             BLI_addtail(newnurb, newnu);
@@ -2212,7 +2211,7 @@ static void adduplicateflagNurb(
         newnu->flagu &= ~CU_NURB_CYCLIC;
 
         for (b = 0, bezt1 = newnu->bezt; b < newnu->pntsu; b++, bezt1++) {
-          select_beztriple(bezt1, SELECT, flag, HIDDEN);
+          select_beztriple(bezt1, true, flag, HIDDEN);
         }
 
         BLI_addtail(newnurb, newnu);
@@ -2224,7 +2223,7 @@ static void adduplicateflagNurb(
         starta = a;
         while (bp->f1 & flag) {
           if (!split) {
-            select_bpoint(bp, DESELECT, flag, HIDDEN);
+            select_bpoint(bp, false, flag, HIDDEN);
           }
           enda = a;
           if (a >= nu->pntsu - 1) {
@@ -2264,7 +2263,7 @@ static void adduplicateflagNurb(
             }
 
             for (b = 0, bp1 = newnu->bp; b < newnu->pntsu; b++, bp1++) {
-              select_bpoint(bp1, SELECT, flag, HIDDEN);
+              select_bpoint(bp1, true, flag, HIDDEN);
             }
 
             BLI_addtail(newnurb, newnu);
@@ -2282,7 +2281,7 @@ static void adduplicateflagNurb(
         newnu->flagu &= ~CU_NURB_CYCLIC;
 
         for (b = 0, bp1 = newnu->bp; b < newnu->pntsu; b++, bp1++) {
-          select_bpoint(bp1, SELECT, flag, HIDDEN);
+          select_bpoint(bp1, true, flag, HIDDEN);
         }
 
         BLI_addtail(newnurb, newnu);
@@ -2502,7 +2501,7 @@ static void adduplicateflagNurb(
           for (b = 0, bp1 = nu->bp; b < nu->pntsu * nu->pntsv; b++, bp1++) {
             bp1->f1 &= ~SURF_SEEN;
             if (!split) {
-              select_bpoint(bp1, DESELECT, flag, HIDDEN);
+              select_bpoint(bp1, false, flag, HIDDEN);
             }
           }
         }
@@ -3237,11 +3236,11 @@ static int hide_exec(bContext *C, wmOperator *op)
         sel = 0;
         while (a--) {
           if (invert == 0 && BEZT_ISSEL_ANY_HIDDENHANDLES(v3d, bezt)) {
-            select_beztriple(bezt, DESELECT, SELECT, HIDDEN);
+            select_beztriple(bezt, false, SELECT, HIDDEN);
             bezt->hide = 1;
           }
           else if (invert && !BEZT_ISSEL_ANY_HIDDENHANDLES(v3d, bezt)) {
-            select_beztriple(bezt, DESELECT, SELECT, HIDDEN);
+            select_beztriple(bezt, false, SELECT, HIDDEN);
             bezt->hide = 1;
           }
           if (bezt->hide) {
@@ -3259,11 +3258,11 @@ static int hide_exec(bContext *C, wmOperator *op)
         sel = 0;
         while (a--) {
           if (invert == 0 && (bp->f1 & SELECT)) {
-            select_bpoint(bp, DESELECT, SELECT, HIDDEN);
+            select_bpoint(bp, false, SELECT, HIDDEN);
             bp->hide = 1;
           }
           else if (invert && (bp->f1 & SELECT) == 0) {
-            select_bpoint(bp, DESELECT, SELECT, HIDDEN);
+            select_bpoint(bp, false, SELECT, HIDDEN);
             bp->hide = 1;
           }
           if (bp->hide) {
@@ -4353,7 +4352,7 @@ static bool merge_2_nurb(Curve *cu, ListBase *editnurb, Nurb *nu1, Nurb *nu2)
         keyIndex_updateBP(cu->editnurb, bp1, bp, 1);
         *bp = *bp1;
         bp1++;
-        select_bpoint(bp, SELECT, SELECT, HIDDEN);
+        select_bpoint(bp, true, SELECT, HIDDEN);
       }
       else {
         keyIndex_updateBP(cu->editnurb, bp2, bp, 1);
@@ -4808,7 +4807,7 @@ bool ED_curve_editnurb_select_pick(bContext *C,
               bezt->f2 |= SELECT;
             }
             else {
-              select_beztriple(bezt, SELECT, SELECT, HIDDEN);
+              select_beztriple(bezt, true, SELECT, HIDDEN);
             }
           }
           else {
@@ -4822,7 +4821,7 @@ bool ED_curve_editnurb_select_pick(bContext *C,
           BKE_curve_nurb_vert_active_set(cu, nu, bezt);
         }
         else {
-          select_bpoint(bp, SELECT, SELECT, HIDDEN);
+          select_bpoint(bp, true, SELECT, HIDDEN);
           BKE_curve_nurb_vert_active_set(cu, nu, bp);
         }
         break;
@@ -4834,7 +4833,7 @@ bool ED_curve_editnurb_select_pick(bContext *C,
               bezt->f2 &= ~SELECT;
             }
             else {
-              select_beztriple(bezt, DESELECT, SELECT, HIDDEN);
+              select_beztriple(bezt, false, SELECT, HIDDEN);
             }
             if (bezt == vert) {
               cu->actvert = CU_ACT_NONE;
@@ -4848,7 +4847,7 @@ bool ED_curve_editnurb_select_pick(bContext *C,
           }
         }
         else {
-          select_bpoint(bp, DESELECT, SELECT, HIDDEN);
+          select_bpoint(bp, false, SELECT, HIDDEN);
           if (bp == vert) {
             cu->actvert = CU_ACT_NONE;
           }
@@ -4863,7 +4862,7 @@ bool ED_curve_editnurb_select_pick(bContext *C,
                 bezt->f2 &= ~SELECT;
               }
               else {
-                select_beztriple(bezt, DESELECT, SELECT, HIDDEN);
+                select_beztriple(bezt, false, SELECT, HIDDEN);
               }
               if (bezt == vert) {
                 cu->actvert = CU_ACT_NONE;
@@ -4874,7 +4873,7 @@ bool ED_curve_editnurb_select_pick(bContext *C,
                 bezt->f2 |= SELECT;
               }
               else {
-                select_beztriple(bezt, SELECT, SELECT, HIDDEN);
+                select_beztriple(bezt, true, SELECT, HIDDEN);
               }
               BKE_curve_nurb_vert_active_set(cu, nu, bezt);
             }
@@ -4888,13 +4887,13 @@ bool ED_curve_editnurb_select_pick(bContext *C,
         }
         else {
           if (bp->f1 & SELECT) {
-            select_bpoint(bp, DESELECT, SELECT, HIDDEN);
+            select_bpoint(bp, false, SELECT, HIDDEN);
             if (bp == vert) {
               cu->actvert = CU_ACT_NONE;
             }
           }
           else {
-            select_bpoint(bp, SELECT, SELECT, HIDDEN);
+            select_bpoint(bp, true, SELECT, HIDDEN);
             BKE_curve_nurb_vert_active_set(cu, nu, bp);
           }
         }
@@ -4910,7 +4909,7 @@ bool ED_curve_editnurb_select_pick(bContext *C,
               bezt->f2 |= SELECT;
             }
             else {
-              select_beztriple(bezt, SELECT, SELECT, HIDDEN);
+              select_beztriple(bezt, true, SELECT, HIDDEN);
             }
           }
           else {
@@ -4924,7 +4923,7 @@ bool ED_curve_editnurb_select_pick(bContext *C,
           BKE_curve_nurb_vert_active_set(cu, nu, bezt);
         }
         else {
-          select_bpoint(bp, SELECT, SELECT, HIDDEN);
+          select_bpoint(bp, true, SELECT, HIDDEN);
           BKE_curve_nurb_vert_active_set(cu, nu, bp);
         }
         break;
@@ -6407,7 +6406,7 @@ static bool curve_delete_segments(Object *obedit, View3D *v3d, const bool split)
       if (split) {
         /* deselect for split operator */
         for (b = 0, bezt1 = nu->bezt; b < nu->pntsu; b++, bezt1++) {
-          select_beztriple(bezt1, DESELECT, SELECT, true);
+          select_beztriple(bezt1, false, SELECT, true);
         }
       }
 
@@ -6417,7 +6416,7 @@ static bool curve_delete_segments(Object *obedit, View3D *v3d, const bool split)
       if (split) {
         /* deselect for split operator */
         for (b = 0, bp1 = nu->bp; b < nu->pntsu * nu->pntsv; b++, bp1++) {
-          select_bpoint(bp1, DESELECT, SELECT, HIDDEN);
+          select_bpoint(bp1, false, SELECT, HIDDEN);
         }
       }
 
diff --git a/source/blender/editors/curve/editcurve_select.c b/source/blender/editors/curve/editcurve_select.c
index 5a1777b7097..b7e6827c6df 100644
--- a/source/blender/editors/curve/editcurve_select.c
+++ b/source/blender/editors/curve/editcurve_select.c
@@ -30,7 +30,6 @@
 #include "ED_object.h"
 #include "ED_screen.h"
 #include "ED_select_utils.h"
-#include "ED_types.h"
 #include "ED_view3d.h"
 
 #include "curve_intern.h"
@@ -47,7 +46,7 @@
 bool select_beztriple(BezTriple *bezt, bool selstatus, uint8_t flag, eVisible_Types hidden)
 {
   if ((bezt->hide == 0) || (hidden == HIDDEN)) {
-    if (selstatus == SELECT) { /* selects */
+    if (selstatus) { /* selects */
       bezt->f1 |= flag;
       bezt->f2 |= flag;
       bezt->f3 |= flag;
@@ -66,7 +65,7 @@ bool select_beztriple(BezTriple *bezt, bool selstatus, uint8_t flag, eVisible_Ty
 bool select_bpoint(BPoint *bp, bool selstatus, uint8_t flag, bool hidden)
 {
   if ((bp->hide == 0) || (hidden == 1)) {
-    if (selstatus == SELECT) {
+    if (selstatus) {
       bp->f1 |= flag;
       return true;
     }
@@ -80,17 +79,17 @@ bool select_bpoint(BPoint *bp, bool selstatus, uint8_t flag, bool hidden)
 static bool swap_selection_beztriple(BezTriple *bezt)
 {
   if (bezt->f2 & SELECT) {
-    return select_beztriple(bezt, DESELECT, SELECT, VISIBLE);
+    return select_beztriple(bezt, false, SELECT, VISIBLE);
   }
-  return select_beztriple(bezt, SELECT, SELECT, VISIBLE);
+  return select_beztriple(bezt, true, SELECT, VISIBLE);
 }
 
 static bool swap_selection_bpoint(BPoint *bp)
 {
   if (bp->f1 & SELECT) {
-    return select_bpoint(bp, DESELECT, SELECT, VISIBLE);
+    return select_bpoint(bp, false, SELECT, VISIBLE);
   }
-  return select_bpoint(bp, SELECT, SELECT, VISIBLE);
+  return select_bpoint(bp, true, SELECT, VISIBLE);
 }
 
 bool ED_curve_nurb_select_check(const View3D *v3d, const Nurb *nu)
@@ -336,9 +335,9 @@ static void select_adjacent_cp(ListBase *editnurb,
           break;
         }
         if ((lastsel == false) && (bezt->hide == 0) &&
-            ((bezt->f2 & SELECT) || (selstatus == DESELECT))) {
+            ((bezt->f2 & SELECT) || (selstatus == false))) {
           bezt += next;
-          if (!(bezt->f2 & SELECT) || (selstatus == DESELECT)) {
+          if (!(bezt->f2 & SELECT) || (selstatus == false)) {
             bool sel = select_beztriple(bezt, selstatus, SELECT, VISIBLE);
             if (sel && !cont) {
               lastsel = true;
@@ -363,10 +362,9 @@ static void select_adjacent_cp(ListBase *editnurb,
         if (a - abs(next) < 0) {
           break;
         }
-        if ((lastsel == false) && (bp->hide == 0) &&
-            ((bp->f1 & SELECT) || (selstatus == DESELECT))) {
+        if ((lastsel == false) && (bp->hide == 0) && ((bp->f1 & SELECT) || (selstatus == false))) {
           bp += next;
-          if (!(bp->f1 & SELECT) || (selstatus == DESELECT)) {
+          if (!(bp->f1 & SELECT) || (selstatus == false)) {
             bool sel = select_bpoint(bp, selstatus, SELECT, VISIBLE);
             if (sel && !cont) {
               lastsel = true;
@@ -477,7 +475,7 @@ static int de_select_first_exec(bContext *C, wmOperator *UNUSED(op))
 
   for (uint ob_index = 0; ob_index < objects_len; ob_index++) {
     Object *obedit = objects[ob_index];
-    selectend_nurb(obedit, FIRST, true, DESELECT);
+    selectend_nurb(obedit, FIRST, true, false);
     DEG_id_tag_update(obedit->data, ID_RECALC_SELECT);
     WM_event_add_notifier(C, NC_GEOM | ND_SELECT, obedit->data);
     BKE_curve_nurb_vert_active_validate(obedit->data);
@@ -510,7 +508,7 @@ static int de_select_last_exec(bContext *C, wmOperator *UNUSED(op))
 
   for (uint ob_index = 0; ob_index < objects_len; ob_index++) {
     Object *obedit = objects[ob_index];
-    selectend_nurb(obedit, LAST, true, DESELECT);
+    selectend_nurb(obedit, LAST, true, false);
     DEG_id_tag_update(obedit->data, ID_RECALC_SELECT);
     WM_event_add_notifier(C, NC_GEOM | ND_SELECT, obedit->data);
     BKE_curve_nurb_vert_active_validate(obedit->data);
@@ -780,12 +778,12 @@ static int select_row_exec(bContext *C, wmOperator *UNUSED(op))
     for (b = 0; b < nu->pntsu; b++, bp++) {
       if (direction) {
         if (a == v) {
-          select_bpoint(bp, SELECT, SELECT, VISIBLE);
+          select_bpoint(bp, true, SELECT, VISIBLE);
         }
       }
       else {
         if (b == u) {
-          select_bpoint(bp, SELECT, SELECT, VISIBLE);
+          select_bpoint(bp, true, SELECT, VISIBLE);
         }
       }
     }
@@ -923,7 +921,7 @@ static void curve_select_more(Object *obedit)
           if (a % nu->pntsu != 0) {
             tempbp = bp - 1;
             if (!(tempbp->f1 & SELECT)) {
-              select_bpoint(tempbp, SELECT, SELECT, VISIBLE);
+              select_bpoint(tempbp, true, SELECT, VISIBLE);
             }
           }
 
@@ -932,7 +930,7 @@ static void curve_select_more(Object *obedit)
             sel = 0;
             tempbp = bp + nu->pntsu;
             if (!(tempbp->f1 & SELECT)) {
-              sel = select_bpoint(tempbp, SELECT, SELECT, VISIBLE);
+              sel = select_bpoint(tempbp, true, SELECT, VISIBLE);
             }
             /* make sure selected bpoint is discarded */
             if (sel == 1) {
@@ -944,7 +942,7 @@ static void curve_select_more(Object *obedit)
           if (a + nu->pntsu < nu->pntsu * nu->pntsv) {
             tempbp = bp - nu->pntsu;
             if (!(tempbp->f1 & SELECT)) {
-              select_bpoint(tempbp, SELECT, SELECT, VISIBLE);
+              select_bpoint(tempbp, true, SELECT, VISIBLE);
             }
           }
 
@@ -953,7 +951,7 @@ static void curve_select_more(Object *obedit)
             sel = 0;
             tempbp = bp + 1;
             if (!(tempbp->f1 & SELECT)) {
-              sel = select_bpoint(tempbp, SELECT, SELECT, VISIBLE);
+              sel = select_bpoint(tempbp, true, SELECT, VISIBLE);
             }
             if (sel) {
               bp++;
@@ -1080,7 +1078,7 @@ static void curve_select_less(Object *obedit)
           }
 
           if (sel != 4) {
-            select_bpoint(bp, DESELECT, SELECT, VISIBLE);
+            select_bpoint(bp, false, SELECT, VISIBLE);
             BLI_BITMAP_ENABLE(selbpoints, a);
           }
         }
@@ -1130,7 +1128,7 @@ static void curve_select_less(Object *obedit)
             }
 
             if (sel != 2) {
-              select_beztriple(bezt, DESELECT, SELECT, VISIBLE);
+              select_beztriple(bezt, false, SELECT, VISIBLE);
               lastsel = true;
             }
             else {
@@ -1175,7 +1173,7 @@ static void curve_select_less(Object *obedit)
             }
 
             if (sel != 2) {
-              select_bpoint(bp, DESELECT, SELECT, VISIBLE);
+              select_bpoint(bp, false, SELECT, VISIBLE);
               lastsel = true;
             }
             else {
@@ -1359,7 +1357,7 @@ static void select_nth_bezt(Nurb *nu, BezTriple *bezt, const struct CheckerInter
   while (a--) {
     const int depth = abs(start - a);
     if (!WM_operator_properties_checker_interval_test(params, depth)) {
-      select_beztriple(bezt, DESELECT, SELECT, HIDDEN);
+      select_beztriple(bezt, false, SELECT, HIDDEN);
     }
 
     bezt--;
@@ -1382,7 +1380,7 @@ static void select_nth_bp(Nurb *nu, BPoint *bp, const struct CheckerIntervalPara
   while (a--) {
     const int depth = abs(pnt - startpnt) + abs(row - startrow);
     if (!WM_operator_properties_checker_interval_test(params, depth)) {
-      select_bpoint(bp, DESELECT, SELECT, HIDDEN);
+      select_bpoint(bp, false, SELECT, HIDDEN);
     }
 
     pnt--;
@@ -1645,7 +1643,7 @@ static bool curve_nurb_select_similar_type(Object *ob,
         }
 
         if (select) {
-          select_beztriple(bezt, SELECT, SELECT, VISIBLE);
+          select_beztriple(bezt, true, SELECT, VISIBLE);
           changed = true;
         }
       }
@@ -1690,7 +1688,7 @@ static bool curve_nurb_select_similar_type(Object *ob,
         }
 
         if (select) {
-          select_bpoint(bp, SELECT, SELECT, VISIBLE);
+          select_bpoint(bp, true, SELECT, VISIBLE);
           changed = true;
         }
       }
@@ -1898,10 +1896,10 @@ static void curve_select_shortest_path_curve(Nurb *nu, int vert_src, int vert_ds
   i = vert_src;
   while (true) {
     if (nu->type & CU_BEZIER) {
-      select_beztriple(&nu->bezt[i], SELECT, SELECT, HIDDEN);
+      select_beztriple(&nu->bezt[i], true, SELECT, HIDDEN);
     }
     else {
-      select_bpoint(&nu->bp[i], SELECT, SELECT, HIDDEN);
+      select_bpoint(&nu->bp[i], true, SELECT, HIDDEN);
     }
 
     if (i == vert_dst) {
@@ -1979,10 +1977,10 @@ static void curve_select_shortest_path_surf(Nurb *nu, int vert_src, int vert_dst
     int i = 0;
     while (vert_curr != vert_src && i++ < vert_num) {
       if (nu->type == CU_BEZIER) {
-        select_beztriple(&nu->bezt[vert_curr], SELECT, SELECT, HIDDEN);
+        select_beztriple(&nu->bezt[vert_curr], true, SELECT, HIDDEN);
       }
       else {
-        select_bpoint(&nu->bp[vert_curr], SELECT, SELECT, HIDDEN);
+        select_bpoint(&nu->bp[vert_curr], true, SELECT, HIDDEN);
       }
       vert_curr = data[vert_curr].vert_prev;
     }
diff --git a/source/blender/editors/include/ED_types.h b/source/blender/editors/include/ED_types.h
deleted file mode 100644
index eba93ed6744..00000000000
--- a/source/blender/editors/include/ED_types.h
+++ /dev/null
@@ -1,27 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later
- * Copyright 2008 Blender Foundation. All rights reserved. */
-
-/** \file
- * \ingroup editors
- */
-
-#pragma once
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/* **************** GENERAL EDITOR-WIDE TYPES AND DEFINES ************************** */
-
-/* old blender defines... should be deprecated? */
-#define DESELECT 0
-#define SELECT 1
-#define ACTIVE 2
-
-/* proposal = put scene pointers on function calls? */
-// #define BASACT                    (scene->basact)
-// #define OBACT                     (BASACT ? BASACT->object : NULL)
-
-#ifdef __cplusplus
-}
-#endif
diff --git a/source/blender/editors/util/CMakeLists.txt b/source/blender/editors/util/CMakeLists.txt
index 640e89a3966..a9e6adc6e60 100644
--- a/source/blender/editors/util/CMakeLists.txt
+++ b/source/blender/editors/util/CMakeLists.txt
@@ -82,7 +82,6 @@ set(SRC
   ../include/ED_transform.h
   ../include/ED_transform_snap_object_context.h
   ../include/ED_transverts.h
-  ../include/ED_types.h
   ../include/ED_undo.h
   ../include/ED_userpref.h
   ../include/ED_util.h
diff --git a/source/blender/makesdna/DNA_anim_types.h b/source/blender/makesdna/DNA_anim_types.h
index e2b58cefef6..0ab14988e40 100644
--- a/source/blender/makesdna/DNA_anim_types.h
+++ b/source/blender/makesdna/DNA_anim_types.h
@@ -1160,6 +1160,9 @@ typedef struct IdAdtTemplate {
   AnimData *adt;
 } IdAdtTemplate;
 
+/* From: `DNA_object_types.h`, see it's doc-string there. */
+#define SELECT 1
+
 /* ************************************************ */
 
 #ifdef __cplusplus
diff --git a/source/blender/makesdna/DNA_curve_types.h b/source/blender/makesdna/DNA_curve_types.h
index 6e18d442ee2..5862c3a6707 100644
--- a/source/blender/makesdna/DNA_curve_types.h
+++ b/source/blender/makesdna/DNA_curve_types.h
@@ -439,9 +439,9 @@ enum {
 
 /* *************** BEZTRIPLE **************** */
 
-/* BezTriple.f1,2,3 */
+/** #BezTriple.f1, #BezTriple.f2, #BezTriple.f3. */
 typedef enum eBezTriple_Flag {
-  /* SELECT */
+  /* `SELECT = (1 << 0)` */
   BEZT_FLAG_TEMP_TAG = (1 << 1), /* always clear. */
   /* Can be used to ignore keyframe points for certain operations. */
   BEZT_FLAG_IGNORE_TAG = (1 << 2),
diff --git a/source/blender/makesdna/DNA_object_types.h b/source/blender/makesdna/DNA_object_types.h
index ac9e61e03e8..add11d61db8 100644
--- a/source/blender/makesdna/DNA_object_types.h
+++ b/source/blender/makesdna/DNA_object_types.h
@@ -477,7 +477,13 @@ typedef struct ObHook {
 
 /* **************** OBJECT ********************* */
 
-/* used many places, should be specialized. */
+/**
+ * This is used as a flag for many kinds of data that use selections, examples include:
+ * - #BezTriple.f1, #BezTriple.f2, #BezTriple.f3
+ * - #bNote.flag
+ * - #MovieTrackingTrack.flag
+ * And more, ideally this would have a generic location.
+ */
 #define SELECT 1
 
 /** #Object.type */
diff --git a/source/blender/makesdna/DNA_sequence_types.h b/source/blender/makesdna/DNA_sequence_types.h
index a46d737ba9d..b436b33cfb3 100644
--- a/source/blender/makesdna/DNA_sequence_types.h
+++ b/source/blender/makesdna/DNA_sequence_types.h
@@ -522,8 +522,6 @@ typedef struct SequencerScopes {
 
 #define MAXSEQ 128
 
-#define SELECT 1
-
 /** #Editor.overlay_frame_flag */
 #define SEQ_EDIT_OVERLAY_FRAME_SHOW 1
 #define SEQ_EDIT_OVERLAY_FRAME_ABS 2
@@ -549,9 +547,12 @@ typedef struct SequencerScopes {
 
 #define SEQ_NAME_MAXSTR 64
 
+/* From: `DNA_object_types.h`, see it's doc-string there. */
+#define SELECT 1
+
 /** #Sequence.flag */
 enum {
-  /* SELECT */
+  /* `SELECT = (1 << 0)` */
   SEQ_LEFTSEL = (1 << 1),
   SEQ_RIGHTSEL = (1 << 2),
   SEQ_OVERLAP = (1 << 3),
diff --git a/source/blender/windowmanager/WM_api.h b/source/blender/windowmanager/WM_api.h
index 0393be93bb5..775b62e7d39 100644
--- a/source/blender/windowmanager/WM_api.h
+++ b/source/blender/windowmanager/WM_api.h
@@ -861,7 +861,7 @@ void WM_operator_properties_select_action(struct wmOperatorType *ot,
                                           int default_action,
                                           bool hide_gui);
 /**
- * Only #SELECT / #DESELECT.
+ * Only for select/de-select.
  */
 void WM_operator_properties_select_action_simple(struct wmOperatorType *ot,
                                                  int default_action,