This function offers four marking modes: "Area layer", "Centerline layer", "From file", and "Mouse drawing".

Normal workflow
Start ->"Add" available/restricted areas one by one ->"Mark" the available/restricted areas in the list below.

Available/restricted areas changes
Re "Add" the available/restricted ->Re "Mark" all available/restricted (clear all previous areas as prompted).
Adding a new available/restricted area
The first method is the same as the two mentioned above.
The second method is to "Add" this new available/restricted area->only "Mark" this new available/restricted area (follow the prompts to keep all previous areas).

Marked available/restricted areas are no longer valid
Uncheck this available/restricted area in the list ->Re "Mark" all available/restricted options (clear all previous areas as prompted).
Other buttons
Preview: Used only to check whether the intended available/restricted areas are correct.
Clear : Clear available/restricted areas.
Delete: Deleting rows in the list does not clear the corresponding available/restricted areas.
Mouse click to delete available/restricted area
Move the mouse to the available/restricted area, and right-click the menu to delete individual available/restricted area.
