Not just on/off, but also colour selection.
When using the permanent pen, having the cursor change is a good idea, but the cursor lacks a 'caret', so it is difficult to position.
If one could add a vertical line to the cursor (the horizontal one is very confusing)
The same applies a bit for the highlighter cursor ...
Some small 'Highlighter' enhancements asked for by my customers:
- Make it more obvious how to 'erase' highlighted text (e.g. by adding a 'transparent/eraser' highlighter)
- When selecting permanent pen, highlighter should optionally switch of automatically