To select an area of the canvas, choose the selection tool
and left-click and drag on the
area you wish to select. You can copy (CTRL-C) or cut (CTRL-X) the selection to the clipboard. You can also
drag the selected area around to move it.
If you paste (CTRL-V) an image from the clipboard into the view, it will appear in the top left of the current cel, in a rubber band selection rectangle. You can position it as you desired. Double-clicking on the selection will set it permanently.
Transparent pasting (CTRL-SHIFT-V) will paste an image, but not include the pixels that are the same colour as the transparent colour of the cel
The entire canvas may be selected by pressing CTRL-A or choosing Select All from the Edit menu.