Open the Polaris Office 4.0 app. Select form type. (.doc) or (.docx). Once your selected document is open, click on the insert button (white circle at the top right which has the + sign in it). That will open a box giving you options to choose from. Select "Free Draw".Once you've selected FREE DRAW a new page opens which have buttons at the bottom. The button in the lower left should be highlighted blue in color with a pen on it. Click on the pen. A new box pops up giving you color options to choose from. There is a slider button which will let you choose the size of your pen. Select your color and size of your pen first. I don't know if there is a way to change your color selection AFTER you have drawn, but there is an ERASE this...or an ERASE PAGE option. This will allow you to back up, select a new color option, and redraw.
Good Luck.