Plane Tool
Ribbon menu → Bodies tab → Solids container → Plane Tool 
or
(Classic) Build → Bodies/Geometry → Plane Tool
Creates a two-dimensional box. You can draw a plane’s length and width in the plane of the screen or the Working grid, if it is turned on. You will find planes most useful when you are creating contact forces between objects, as explained in Contacts.
When you create a plane, you can select to create a new part consisting of the plane geometry or add the plane geometry to an existing part or ground. If you create a new part, it has no mass since it is composed of only wire geometry.
Learn about Creating Two-Dimensional Plane.
For the option: | Do the following: |
|---|---|
New Part/Add to Part/On Ground | Select either: ■New Part - Creates a new part. ■Add to Part - Adds plane to another part in your model. ■On Ground - Adds the plane to ground. Tip: Add geometry to ground if the geometry does not move or influence the simulation of your model. For example, if you are simulating a car driving around a race track, the geometry that defines the race track can be added to ground. |
Notes on Modifying Planes: One hotpoint appears after you draw the plane. It lets you modify the length and height of the plane. For more information on modifying geometry using hotpoints, see Using Hotpoints to Graphically Modify Geometry.