How to change app icon image and size?
You can change icon size and image through icon change function (brush shaped icon).
How to change
1. Long press the icon you would like to change. Observe a brush icon appear on the icon.
2. Tap the brush icon.
3. Select from the provide list or tap + to create from an image of your choice.
4. Drag to select size of icon, tap OK. Select an image from the gallery, crop and tap OK.
5. The app icon is now changed.