Next to that are the handy bunch of colors that you want easy access to. If you change this, you change the color of nothingness.

The first color, all by itself, is your 'zero clear' color - that is, transparent. You can change any of these colors by right-clicking it, then selecting a replacement color. The color palette consists of the colors you have easy access to. There's three basic elements to the Home interface: Your color palette, the drawing tools, and the ink types.

Oh, and if you ever get stuck in an interface bit where you want to exit, you can just RMB over the open area, or press 'Space'. So, if you use the LMB in the open area, you will draw with the selected tools. RMB on the Zoom button will allow to to pick the degree of zoom. For example, LMB on the Zoom button will let you select an area to zoom into.

As a rule of thumb, left mouse button (LMB) will do standard actions, while right mouse button (RMB) will go into relevant setup/option interface of some sort. This is the interface you'll have for most of the time. Well, I can try and cover the basics, at least.

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