How to draw straight line in desktop?

Presentation Pointer allows you to draw line in desktop. Activate Live Drawing and then you can:

1. Press <Ctrl> twice to cycles through shapes (Free, Line, Rectangle, Ellipse)
2. Press <Shift> twice to cycles through colors (Red, Yellow, Green, Cyan, Blue)
3. Hold down <Ctrl> you will see what the shape and color it is now
4. Hold down <Ctrl> and then move the mouse to draw on screen, together with the <Shift> to draw arrow lines or solid shapes
5. Hold down <Ctrl + Alt> to erase marks. Press <Esc> twice to clear all