You can make sure vanilla widgets stay on top by forcing your custom image behind them. Two quick options:
- Open the menu bar → Element → Layers and drag your picture element below the vanilla buttons in that list so it renders “behind” them.
- Right-click the editor background and toggle Render Custom Elements Behind Vanilla; this keeps every custom element (like your image) below the vanilla widgets automatically.
Both tips come from the FAQ’s “How do I change the layering of elements?” section ☺️