In LO Impress GTK3 with Classic UI I see "Insert - Vertical Text" button only in 24.2 Tabbed not Toolbar, and not at all in 7.5. If this is new, the same command should be in Classic as in Tabbed.
It is not new. This is referring to .uno:VerticalText, which is typically grouped with .uno:DrawText (in calc/writer) and .uno:Text (in draw/impress). In some places it is added as hidden: sw/uiconfig/swriter/toolbar/standardbar.xml: <toolbar:toolbaritem xlink:href=".uno:VerticalText" toolbar:visible="false"/> However, it should be visible in the main Writer Draw toolbar: sw/uiconfig/swriter/toolbar/drawbar.xml: <toolbar:toolbaritem xlink:href=".uno:VerticalText"/> It was deliberately set to hidden in 5.1.0 with commit 89f7a5670ae0b21c8a80f73d27b5bc1181021373 Author: Yousuf Philips on Fri May 22 14:15:41 2015 +0400 tdf#81475 Additional improvements to Writer's toolbars But this bug report is focused on Impress (which matches Draw generally). sd/uiconfig/sdraw/toolbar/standardbar.xml: <toolbar:toolbaritem xlink:href=".uno:VerticalText" toolbar:visible="false"/> sd/uiconfig/simpress/toolbar/standardbar.xml: <toolbar:toolbaritem xlink:href=".uno:VerticalText" toolbar:visible="false"/> and isn't included at all in sd/uiconfig/simpress/menubar/menubar.xml The user can find VerticalText via View -> Toolbars -> "Text". I'm not sure I would include it in the menu. It doesn't seem valuable enough to take up space - so I agree with the "hidden" status.
Ok, let's close