Creating Objects
 

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.