Reference Cinema 4D Cinema 4D Prime Tools Menu Modes
Function available in CINEMA 4D Prime, Visualize, Broadcast, Studio & BodyPaint 3D

Edges

Click this tool when you want to edit the edges of polygons. Selected edges are colored.

You can select and edit edges in much the same way as for points.

You can use the Move, Scale and Rotate tools to edit the selected edges. To delete the selected edges (including their polygons), press Delete.

Tools that can be useful for editing such as the Bevel, Edge Cut and especially the Polygon Pen can be called up via a contect menu. To do so, simply right-click on a point. Mac users need to Cmd+click to call up the context menu.