The basic steps to draw is as follows:
1 Left mouse button click at the starting point
2 Draw the mouse while the button pushed
3 Release the button at the end point
Use left mouse button to draw, right mouse button to erase (using back color).
If you chose tools other than fill tool, you can select the pattern of the line.
Draw a line
Draw a filled rectangle
Draw a non-filled rectangle
Draw a filled ellipse
Draw a non-filled ellipse