​Line tool
​Arc tool
Color to use for line, arc, and text tools
Line thickness to use for line and arc tools
​Text tool
Text to use for text tool
​Eraser tool
Undo the last thing that was drawn
Link to these help documents
Position or dimension information
Cursor position
Hints about what to do
Q. Can I zoom in and out on the drawing, or pan around? A. No, maybe someday. Right now you are limited to the size of your browser window.
Q. Can I add multiple layers, sheets, or pages? A. No. Best you could do currently is open multiple browser tabs and save the projects separately.