1.       the push/pull works on any flat surface, horizontal, or vertical

2.       sketchup in the tools will snap or infer to corners, edge and any other geometry

3.       you can use the navigation tools to look around the models

4.       go to the menu and and look for self paced to access more help

5.       you can click somewhere in the sketchup and move away and click again

6.       its not really  a good idea to have rectangle crossing over each other

7.       when using the orbit to look around the rectangle its just a flat surface

8.       but often you can start by drawing flat shapes and then pull them up into 3d

9.       use the push/pull icon the make the rectangle look 3d

10.   the pan tool is a hand shape icon

11.   the tool is used to panning the model back and forth across the screen

12.   you hold the mouse button down and move your mouse around

13.   the orbit, zoom, and the pan are all navigation tools

14.   you have to be able to move around in 3d space easily to use those tools

15.   the rectangle tool is a simply click with the mouse