When filling out an interactive form, you can navigate from field to field by clicking on a field with your mouse. When you are finished filling out a text field, press Enter.

You can make a selection in a scrollable list box by clicking on the list box and scrolling to your choice with your mouse.

There may be some parts of a form that you may need to fill out by hand after you print the form. For example, you might have to circle certain things, or sign the form in one or more places. If you wish to do this electronically, you may want to try Xournal.