Technical Drawing - 3D Modeling Basics

To create a hole through a 3-dimensional box the drafter can place a 3-dimensional cylinder into the box and subtract it.

A useful method for using the grid is to set it to Display Grid Beyond Limits.

In 2-dimensional drafting we work on the X and Y axis. By adding the Z axis drafters can develop 3-dimensional models.

The extrude tool will extrude a 2-dimensional shape even if the corners are not closed.

The union command only works on 2-dimensional objects.