Currently the tools have a tooltip with the name of the tool. It would be nice if this tooltip also displayed what the keyboard shortcut for the tool is (e.g. "T" for Text, "A" for Arrow, etc.), so that these shortcuts would be more discoverable and people could become independently proficient in the app without having to e.g. read a manual.

The select tool, in particular, could also have information in the tooltip about the clone function with the Alt modifier, or the alternate selection mode with the Ctrl modifier.

An alternative could be a bottom bar, as is shown e.g. in Inkscape, that offers information about how the current tool can be used (see attached screenshot).