Click anywhere on the canvas to zoom in and place pixels.
You are drawing for a Collab
You pledged your drawing ability to this Collab, so your pixels are placed on its blueprint instead of wherever you click. The Canvas Editor stays closed while that pledge stands.
Arrow keys move the cursor. Click a pixel, or press Space/Enter, to place the selected colour.
Tap a pixel to place the selected colour. Use the arrows to move around the canvas.