The Intelligent Cursor items define the snapping options. The dialog contains these options:
Use the Intelligent Cursor — When selected, enables the Intelligent Cursor and also enables you to select which entities you want to be able to snap to.
Use the Intelligent Cursor — When selected, enables the Intelligent Cursor and also enables you to select which construction lines you want to display.
Use legacy snapping — When selected, enables snapping for legacy functionality where the Intelligent Cursor is not available.