To draw an object, simlpy click the mouse in one of the
three 2D viewports and drag. A bounding
box will be drawn with the mouse:
You can click and drag on one of the tabs around the
bounding box to adjust the size, or click within the bounding box and drag to
move it:
When you are done adjusting the size of the box, press Enter
and the object will be created, or Right-click to bring up the creation
menu:
You can choose other objects to create from the Side
Panel. Objects are grouped by
categories.