I'm wondering what does the "Render mode" really affect? What's its purpose from the user perspective? Why does it exist?
The wiki page doesn't describe much:
Source: The section plane object to be displayed
All On: If hidden objects must be shown or not. If False, only objects that are visible in the 3D view are rendered
Render Mode: The render mode to use, Solid or Wireframe
Show Hidden: If the hidden geometry (the part of the goemetry that lies behind the section plane) is shown or not. It will be rendered in dashed line, which can be configured in the Arch preferences.
Show Fill: If cut areas must be filled with a grey color or not
Line Width: The width of the main lines. Cut lines and projected/2D line widths ratios can be configured in the Arch preferences
Font Size: The size of all texts that appear in this view