Adobe Character Animator (IOS)

I can't click on "fit to screen" option on the viewer (it allows me to type a percentage but it will not let me simply click on the "fit" to get the fit.. Thank you0OIther than that I like this program- it does have an issue at times as well syncing the audio to the character after 3/4 scenes with the character.. (it forces me to make another scene which isn't fun because I have certain things in place for a quicker turnaround.