To configure Multi-Edit Actions, in Mail View tap More (o o o) | Global Settings | Customize Menus | Configure Action Buttons | Configure Multi-Edit Actions.

Select 4 Actions.
Already Selected Actions will be Greyed Out.

folder_trash

Delete

ic_action_wear_archive

Archive

ic_action_wear_mark_as_read

Mark Read/Unread

menu_item_starStar/Unstar
ic_action_move

Move

 mark_all

Mark All

ic_action_done

Done/Undone