good suggetion ... and update 'tool selection' more user friendly, need colour fill option too with opacity changing ( I cant suggest coz my vote is over)

Dimensions please

Highlighter icon should be permanent on toolbar or have option to select which icon to put on the toolbar

Need arrows and dimensions, tool pack ok

Highlighter is a must

Add theese to the Tools pack.

Arrows, Dimensions, & more shapes.

I think this function is already - partially - available if you purchase the tools pack..

Can it be made to recognize a sketched shape?
How about inserting a Cartesian coordinate grid? Settings for grid size, numbers,...

I would love to have the ability to insert a set of axis, either x-y or r-t-z.

It would be fine to use shapes similar you can do it in the App LectureNotes.

Some basic shapes such as lines, arrows, curves, rectangles, circles, hexagons, and triangles would be appreciated.