# CAD Import : Map layers to properties
This page is enabled only when the “Edit relationship between layers and element properties” option in the previous page is checked. The table on this page specifies the relationships between the selected layers and the property names and numbers they are assigned, in addition to the section description, if applicable.
Tip: To automatically assign sections to the given property, the section description must be enclosed within curly braces { and } as a part of the layer name.
Tip: The default attributes of all the properties will correspond to the defaults in the property tables of the current model.
Note: The property numbering will start from the highest section property number in the model. Changing the property number to a value already present in the property tables will overwrite it without any warning.