Changes

=== Designing 3D Models ===

=== Designing 3D Models ===

There are several types of modeling operations. Some software manipulates simple shapes like spheres or cubes, pushing and pulling on control points until the desired shape is achieved. Other software uses 2D sketches to extrude or rotate shapes.  

There are several types of modeling operations. Some software manipulates simple shapes like spheres or cubes, pushing and pulling on control points until the desired shape is achieved. Other software uses 2D sketches to extrude or rotate shapes. Some software is intended to design parts that have precise dimensions, like CAD programs, while other software is more suitable for designing free-flowing shapes or character modeling. If the software you are attempting to use isn't letting you make what you need, you should consider other applications.

=== Saving a copy of the file for printing ===

=== Saving a copy of the file for printing ===