hi,I have download the Tread3.0 source code and run , when I select cube in the right tree,I cannot add it in the scene, I found that in the left panel ,i can select only but can not to do any add-things!thanks
If you look at the main site, it lists the basic key combination for using the editor.
To add a cube, select it and then in one of the 4 views hold ALT and right click. You can rotate around your selection by holding alt, press down the middle mouse button and move the mouse. To pan around, just hold the middle mouse button and drag your mouse.