From this tab you can build your areas.
You can change the colors related to drawing areas.
Bake and Clear perform the same function as the same Unity Navigation buttons. Note: This function cannot be performed by Unity Navigation.
Draw in Scene View: Allows you to select areas / edit them directly in Scene View. When this item is enabled you cannot work in Game View.
Since version 3.1 the Auto-Draw in Scene view option has been added. By enabling this feature you will be able to work in Game View and Scene View without having to activate/deactivate Draw in Scene View.
Create new level, Connect vertices, Select vertex are functions visible and usable only if the Multi-Level scene option has been enabled. Watch this video to understand how to use them:
New Walkable area: create a new walkable area. You will not be able to switch tabs until it has been closed. However, you can delete it while it is still incomplete.
When a Walkable area is selected (if it isn’t, double click on an edge of it) the New NotWalkable area button will be enabled. This area will be a child of the selected walkable area. You can have multiple walkable areas with their respective non-walkable areas in the scene.
Use small spot: display vertex icons very small. Useful when using the Simple Mesh work type or when the vertices are very close to each other.
Hide spots: hide / show vertex icons.
Spot radius: Configure the vertex to react closer/farther on hover.
Line radius: Same as Spot radius but on area edges.
Keep line straight allows you to draw straight lines in either or both horizontal and vertical directions. Line offset defines how far the mouse must be from the line to bypass this behavior.
Reverse area reverses the position of the vertices of the selected area. Useful if the area is not baked as it is not drawn clockwise.
Delete areas deletes all areas in one go.
Save area data stores the areas values. Useful for storing all the vertices of the areas if you want to try to modify them. Load area data loads the last saved configuration. Do not use this function if you have changed the camera settings after saving the vertices.
To insert new vertices, delete them, move them and more, read the To know section.