Unable to add styles in Libreoffice Impress

Working with Impress Version: Build ID: 1:6.3.5-0ubuntu0.19.10.1 on Linux.

I am not able to add styles. In the Style tab (in both Drawing or Presentation styles)

  • the right-click elicits a menu with only “Modify” and “Hide”
  • the “New style from selection” icon is grayed out even if there is a selection in the text

Am I missing something (file/directory in my home dir)? Configuration problem? Other?

I can add styles in Writer, so why the restriction in Impress?