The “copy” or a number appended to it.
command adds a copy of each selected layer to the image. The name of each new layer is the same as the name of the original layer, but withNote that if there are any parasites attached to the selected layers, they are not duplicated.
You can access this command
From the main menu through
→ .By using the keyboard shortcut Shift+Ctrl+D.
From the Layers Dialog, you can access it through the command of its context menu, or by clicking on the icon button on the bottom of that dialog.