Merging Layers
The contents of two or more layers can be merged into one single layer. Hold the Command ⌘ key to easily select several layer, or hold the Shift ⇧ key to select all the layers that lie between the first and the second layer that you choose to select.
To merge two or more layers, select these layers and choose Merge Layers from the Layer actions menu, or choose Arrange > Merge Layers [⌘ - E] from the menu bar.
Tip: You can also access the Layer actions menu by right-clicking on a layer.
Select only one layer and choose Merge Down from the Layer actions menu to merge your selected layer with the one that lies right below it in the Layers panel. Alternatively, you can choose Arrange > Merge Down [⌘ - E] from the menu bar.
Choose Merge Visible from the Layer actions menu, or Arrange > Merge Visible Layers [⇧ - ⌘ - E] from the menu bar to merge all visible layers into a single layer.
Next: Blending Layers >
