2D Grid
XYZ, Changes the view of the 2D Grid
Right click and drag to move around in the 2D View
Right click and let go, this brings up the triggers, entities and so forth.
Textures are shown here, shift select a brush and click texture to give the whole brush that texture. Ctrl and Shift to select a face on a brush to apply the texture to.
3D View, right click and let go and you can fly
Around using the arrow keys near the umber pad,
Using your mouse like in et to move in the directions
You want to go.
Right click again to stop.
These are the selection tools, Create a brush and put it over the things you want to select. Use the last one as it’s the best, it wont select any thing else besides the things u have the brush over.
Subtract will cut out a shape of the brush you have selected inside another
Hollows out a brush