LightField

Click or drag to add light. Each stroke adds one brightness step. In the grid, use the arrow keys to move between lights, Home and End to jump to the row edges, Page Up and Page Down to jump to the column edges, Space or Enter to add light, and Delete to turn a light off. Number keys, or the left and right bracket keys, select colors. Shift with a bracket key changes light sets; outside the grid, Left and Right select colors and Up and Down change light sets. Choose Off to erase. Undo reverses a whole stroke.