NEW IN R18
As the name suggests, the Plane Cut tool cuts along the surfaces of planes (also of multiple selected objects). The tool can be used interactively: After a plane has been cut in the Viewport it can be moved and rotated freely (the interactive tool settings in the Attribute Manager are only partially modifiable). This tool will be used often for architectural modeling in particular.
The cut line or manipulator (see below) will remain visible and therewith adjustable in all views until you switch tools or the
The Plane Cut function is designed primarily for technical modeling and less for organic modeling and can be used to cut polygon objects in all three component modes (Point, Edge, Polygon).
The description of the Plane Cut tool is made based on the Free Plane Mode (the other modes are explained elsewhere).
Click and drag a cut line (or create one with two mouse clicks). This represents the cut plane that will cut through the object in the direction of view.
The cut line can be snapped to polygons, edges or points, or placed freely in space. As soon as the line has been created it can subsequently be adjusted (in the same view) using the control points at its ends or moved by clicking and dragging the line itself.
If you change views (the line is displayed in all views) or the Plane Position / Plane Rotation values in the Attribute Manager, the plane will be replaced by a manipulator, which can be used to freely position and rotate the plane (which lies in the green circle):
Here you will find a series of handles (auto-snapping works for all with the exception of moving axes):
The following hotkeys are available: