After adding and defining the different levels within a project, you need to make sure that all Spatial Objects in the data source are associated with the correct level(s). For example, an escalator travelling from ground level to level one must have its lowermost point associated with ‘Ground Level’ and its uppermost point associated with ‘Level One’.

To associate Spatial Objects with levels:

1. From the 'Levels' portion of the Level Manager, highlight the level you wish to associate objects with (for example click on 'Ground level' to highlight it.
2. To make it easier to find the Spatial Objects that you want to associate with a level, you can use various filtering and organising methods in the 'Spatial Objects Reference Level' portion of the Level Manager.
   
   
   • From the drop-down menu above the 'Unassigned Objects' column, you can opt to view 'All Objects', 'Only Entrances', 'Only Level Entrances/Level Exits', 'Only Stairs' or 'Only Escalators'.
   • To group the 'Top' and 'Bottom' parts of Stairs and Escalators together sequentially, check the box labelled 'Group Top/Bottom'.
3. For each object you wish to associate with the level you highlighted in step 1, click the object to highlight it and click the > button to add it to the level's list of objects. If you make a mistake and want to remove an object from a level, click the < button.
   Note: For vertical circulation objects like Stairs and Escalators, ensure that their upper and lower points are associated with the correct levels.
4. Repeat from step 1 for all required levels and objects until you have allocated all objects to each of your levels.
5. If you want LEGION 3D to automatically create 3D versions of the vertical circulation objects check the box labelled 'Auto generate the vertical circulation objects'. If you have imported vertical circulation objects from another 3D application, you will probably want to leave this box unchecked.
6. Click OK. Any automatically generated Spatial Objects should now be visible in the loaded scene.