In the Canvas Layer editor, select the image layer you want to merge.
In the Canvas Layer editor choose Layer > Merge below.
The image layer is merged with the image layer beneath it.
In the Canvas Layer editor, select any image layer.
In the Canvas Layer editor, choose Layer > Merge Visible.
All visible image layers in the canvas plane are merged into the lowest visible layer.
In the Canvas Layer editor, select any image layer.
In the Canvas Layer editor choose Layer > Merge All .
All image layers in the canvas plane are merged into a single image layer.