ℹ️ This feature is available to all users.
You can add construction planes so you can easily position a sketch or body on a specific plane, or use the plane as a mirroring plane.
The plane type is broken down into these:

Offset from Face
You can select a face, closed sketch filling, or a plane, and a new, parallel plane will appear. You can move the plane with the arrows. 
Parallel to Face at Point
Select a face, closed sketch filling, or a plane. When you place a point anywhere in your design space, a plane will be created there, parallel to the selection. 
Through Edge at Angle
Select a closed sketch or face’s edge or line, or an axis to create the plane. You can position your plane by adjusting the angle of rotation.

Perpendicular to Face at Point
Select an edge, line, or axis. When you place a point anywhere, a plane perpendicular to the selection will appear, with the point as its center.

Through 3 Points
Place three points in your design space, and a plane that includes all three points will be created.

Midplane
Select two faces or planes. A plane will be created in the middle.

Perpendicular to Curve at Point
Select a curve in a sketch. A plane will appear, with its center on the curve, and you can move it along the closed sketch.