Use the [Open] menu to open a file.
You can open UTF-8 and Shift-JIS files, but when you save them, they will all be converted to UTF-8.
Use the [Save] menu to save a file.
The first time you save, you tap the folder and file name, but from the second time onwards, the file will generally be saved by overwriting the previous one.
You can select and delete files using the [Delete] menu.
You can search for strings using the [Search] menu.
A text editor limited to UTF-8/Shift-JIS files