Promoting the background layer
To have the Background layer to function like other layers, you can promote it to a regular raster layer. Raster layers support transparency and can be moved anywhere within the stacking order. For more information about the background layer, see Understanding layers.
To promote the background layer to a regular raster layerEdit tab
• Choose Layers Promote Background Layer.
You can also right-click on the layer and choose Promote Background Layer.