You can easily rearrange an image's layers in the Layers panel or directly in the document window. You can also lock layers to protect them.
Drag the layer or group up or down in the Layers panel. Release the mouse button when the highlighted line appears where you want to place the layer or group.
To move a layer into a group, drag a layer to the group folder . If the group is closed, the layer is placed at the bottom of the group.
Select a layer or group, choose Layer > Arrange, and choose a command from the submenu. If the selected item is in a group, the command applies to the stacking order within the group. If the selected item is not in a group, the command applies to the stacking order within the Layers panel.
To reverse the order of selected layers, choose Layer > Arrange > Reverse. These options appear dimmed if you do not have at least two layers selected.
By definition, the background layer is always at the bottom of the stacking order. Therefore, the Send To Back command places the selected item directly above the background layer.
You can select the layers that you want to move directly in the document window. In the Move tool’s options bar, select Auto Select, then choose Layer from the drop-down menu. Shift-click to select multiple layers. Select Auto Select, then choose Group, to select the entire group when you select one layer in the group.
You can lock layers fully or partially to protect their contents. For instance, you may want to lock a layer fully when you finish with it. You may want to lock a layer partially if it has the correct transparency and styles, but you are still deciding on positioning. When a layer is locked, a lock icon appears to the right of the layer name. The lock icon is solid when the layer is fully locked and hollow when the layer is partially locked.