Click the board, then paste an image (Ctrl/Cmd+V) — copy one straight from Google Images or anywhere else. Drag to move, use the corner handle to resize, and click a piece to bring it to the front.
Pasted images and notes stay in your browser only for this session — nothing is uploaded or saved, and they're gone when you reload the page.
Pick your own colours to sit alongside the board — click a swatch to copy its hex code, or use the brush to change it.