Build from the background
Start with the background or main photo, then add text and smaller elements above it. Think of each layer as a separate piece in the composition. AttoP’s published description includes layer-based editing, stacking, hiding and reordering, so you can adjust the parts as the design develops.
Check the stacking order
If an object disappears, another layer may be covering it. Reorder the layers to bring the intended element forward. Hide a layer temporarily to compare versions without losing the rest of the composition. Keep important words and faces clear rather than adding decoration simply because another sticker is available.
Keep the result readable
Zoom out and look at the overall design. A useful layer arrangement supports the message, with a clear focal point and enough space between elements. After changing the order, recheck the edges and text contrast. The saved image is what viewers will see, so inspect that result rather than relying only on the editor view.