This topic discusses the settings for the mitre shelf cabinet,, and also touches on three other very similar cabinets - the lighting valance, overhead underpanel and wide gable.
Watch the Video A Minute with Mike discusses the settings for the mitre shelf cabinet and 3 other very similar cabinets i.e. the lighting valance, overhead underpanel and wide gable.

If these are missing from your library, see topic on Insert Unused Based Ons
See also the topic on Universal Verticals as these cabinets use similar options.
The video in this topic discusses the Mitre Shelf ...
The Help button opens the Help Properties page as shown below left.
The
underneath a Style indicates that this is the style in use.
The Options button opens the Part Properties page as shown below right.
This allows you to customise the Width and Depth as indicated by the image of the selected cutout.
The description of the selected style will be displayed before the 'Options' button on the shape page.
A Minute with Mike : Learn about the settings for the Mitre Shelf cabinet, and very similar cabinets i.e. the Lighting Valance, the Overhead Underpanel and the Wide Gable. [2:13 mins]