Whiteboard options are limited

Hi
I’ve tried Whiteboard to upload an image and circle parts in order to test students on these parts.
I found the width of the stroke very narrow and the lack of color options very damaging. Does anyone have a walk around?
Thanks
Peter

Hi! The width of the pen can be adjusted using the blocks under “line thickness”, to make additional “colors” I drop down the opacity and layer the brush strokes
coloroptions