Layer item invisible even when active

i put some sprites in layer 0 and layer 1. but layer 0 item is not visible even after activating both layers. how do i make this visible ? the sprites are not visible in the editor and also in preview.

Check the layer properties, the layer may have a background set.

i have checked both layers, and they have white background set and they are initially visible.

LAYER 1 should be transparent so that you can see layers underneath it.

thank you all, it worked after making layer1 transparent. But in preview, the background is all black,but i think this will be solved by putting sceneries and background color set to white. thanks allan.