Video tutorial on how to edit your pictures:
A lot of our help desk articles mention something called "edit mode."
Here's how you find it:
Entering "Edit Mode"
First, find the picture you want to edit in the picture list of your project.
Tap it once to bring the picture up in the video preview (a pencil icon will appear on the picture.)
Then, tap it again to enter "edit mode." If your screen looks like the one below, then you're in the right place!