Gallery item management
The Gallery interface can manage all sprite files, including creating, deleting, sorting, and opening operations.
Sort the items in the gallery
In the upper left corner of the gallery, click the drop-down menu 
to select the sorting method you want, including sorting by date, sorting by type, and sorting by kind.
When sorting by kind, folders will be arranged at the front, and ordinary sprite files will be arranged at the back. Among items of the same type, they are sorted by name.
When sorting by date, the most recently modified will be listed first.
Duplicate, rename, and delete item
Long press an item to open the context menu and select the corresponding operation.
At the same time, you can also Show in Files to view items in the Files App.
Create folder in the gallery
Click on the folder button 
in the upper right.
Move into folder
Long press to select an item, then drag it to the folder.
To move an item out of a folder, drag it onto the Back folder.