Files & Customization
You can add frames using:
- Frame > New Frame (Alt+N): Creates a copy of the current frame in the next position.
- Frame > New Empty Frame (Alt+B): Creates a new empty frame. (All transparent layers with an empty cel, and the Background layer is cleared with the active background color.)
- Frame > Duplicated Cels (Alt+D): Copies the current cel, or creates a copy of the current Timeline selection, into the next position/frame.
- Frame > Duplicated Linked Cels (Alt+Shift+D or Alt+M): Creates links to the current cel (or the current Timeline selection) into the next position/frame.
+ in the status bar can be used to add new frames (it's like pressing Alt+N):
Some information: https://community.aseprite.org/t/913