When the default Highlight text tool (marker icon) is applied on document with inconsistent text (either poorly generated text scattered across page, math formulae etc.) the highlighted area does not look good or even does not make sense. Of course, I can manually click&switch to Drawing tool (pencil icon) and mark that area by hand but it can be set to other color, thickness, and opacity. I wish I could switch between these tools using ALT, CTRL of SHIFT keys for rapid commenting (while keeping the same color, thickness and opacity - ust like if the Highlight text tool is used on document without selectable text in that area).

Robert