When you first open the app, it will show your last picture taken. You can scroll through all the pictures in your gallery until you come to the one you want to edit.
Here is an example of how that works... you click stickers, scroll through the options (I only use the free ones but there are others you can purchase) and choose the one you want. It will pop up in the picture and you drag it to the place you want it and the apprpriate size.
The other thing I use is the draw feature. I use it to draw the arrows that you see in my picture (though as I am typing this I am now seeing there is an arrow sticker that I suppose I could be using...but I get to choose the colors if I draw my sloppy arrows myself).
As you can see there is a TON you can do with this app. The effects menu lets you change the color as you can see in the picture below.
(As mentioned the last time, I was not given anything in exchange for this post. I posted this on my own in order to share something that works with all my amazing readers.)
And don't forget about the AMAZING educents bundle!!