Currently the 3 icons below "file" and next to "Design" or "3D Rendering" have no ToolTip explaining what they mean. In my opinion the icons are not self explanatory enough to have no ToolTip. The icons below "Design" or "3D Rendering" are much better.
The "undo" button is self explanatory, but for should probably also get one.
If possible probably most of the settings/features in this row should have a ToolTip with some info of what to change there

edit: I confused context menus with Tooltips, so the title is still wrong