I am attempting to use office draw to draw some dots on an image of a guitar fretboard.
How do you get the mouse to pick up the shape that you want to use?
Using various shapes may be as simple as selecting the shape with the mouse then with the cursor on the starting point of drawing, hold down the left mouse button while dragging. But there are a lot more options depending upon the shape selected. You should reference chapter 2 in the Draw guide for more information found on this post.