Insert mode on Google Keyboard

Question

I've just been typing HTML in a browser tab online and all of a sudden had triggered insert mode (where typing overwrites the following character) using a keyboard on a Chromebook (Chrome OS) - I had no idea how to switch it off so just had to save my draft. I never knew I had this capability and can't figure out how to get it back on. The shortcut lists online offer no hints!

I think I was playing with ctrl shift and alt but no idea what other keys unfortunately...

Answer 1

The search key on the chromebook (the one represented by the magnifying glass) when pressed in combination with the period key will engage and disengage overwrite.

Answer 2

To desactivate overtype mode (or insert mode) on French-layout keyboard:

search key (magnifying glass) + . (dot key)