I can open 2 apps on my phone
So i'm will test it

Step #1: You need a computer >:)
Step #2: Get the play store
Step #3: Download AnimeMaker by kenmaz (I think)
Step #4: Change the size of the App Window once it's opened

Here is some more words:
You can't post on Windows Computer or the Website, Use a Chromebook or some other kind of computer.

Im want to know so mush

Do you want to know how to change the canvas size?

Wow