With the Tool Pack, you are able to create rectangles, ovals/circles, and straight lines.Javier Oropeza commented
The tool pack needs all the tools acrobat has. The arrows for sure, but also the revision cloud maker, the connected line segment tool. Lastly it needs the ability to make the shapes have a fill color with adjustable transparency. The line tools should also have selectable line types like dashed, dotted etc.