diff --git a/dox/dev_guides/upgrade/upgrade.md b/dox/dev_guides/upgrade/upgrade.md
index 15c9aa3d14..6d893fbeee 100644
--- a/dox/dev_guides/upgrade/upgrade.md
+++ b/dox/dev_guides/upgrade/upgrade.md
@@ -1608,10 +1608,11 @@ so that related methods have been removed from AIS_InteractiveContext interface:
 
 A set of deprecated methods previously related to Local Context and now redirecting to other methods has been preserved to simplify porting; they will be removed in next release.
 
-@subsection upgrade_740_extremaalgo Changes in behavior of Convert algorithms
+@subsection upgrade_740_geomconvert Changes in behavior of Convert algorithms
 
 Now methods *GeomConvert::ConcatG1*, *GeomConvert::ConcatC1*, *Geom2dConvert::ConcatG1*, *Geom2dConvert::ConcatC1* modify the input argument representing the flag of closedness.
-@subsection upgrade_740_selection Change in selection API and picked point calculation algorithm.
+
+@subsection upgrade_740_selection Changes in selection API and picked point calculation algorithm.
 
 *SelectBasics_PickResult* structure has been extended, so that it now defines 3D point on detected entity in addition to Depth value along picking ray.
 *SelectMgr_SelectingVolumeManager::Overlap()* methods have been corrected to fill in *SelectBasics_PickResult* structure (depth and 3D point) instead of only depth value, so that custom *Select3D_SensitiveEntity* implementation should be updated accordingly (including *Select3D_SensitiveSet* subclasses).