Working with the Locations Tree and the Devices List3Com ® AirProtect Planner User Guide15In the Manage Layers dialog box, some or all the layers are selected by default. This is because every AutoCAD file stores thestatus of the layers that are turned on or off based on the selected checkboxes of layers.• Layer Name: Select the checkbox against the layers you want. You can override the existing status of each layer bymanually selecting them based on your requirement.• Material Type: Select the material type from the drop‐down list, as populated from the material repository. Planneruses all this information to model the objects on the floor map.• Preview: Reflects the changes with the selection of layers.• Enlarge this view: Click to view the enlarged view.• Restore to normal View: Click to restore the enlarged view to normal view.Click <Apply> to execute the changes made.On the Manage Layers screen, if you click <Cancel>, the AutoCAD file is not imported and you will see a blank image on thelayout model.CHECKSUM:When you load a node with an AutoCAD file, Planner validates the attached AutoCAD file. Planner checks the CHECKSUMvalue of that AutoCAD file and verifies it with the CHECKSUM value stored in the .spm file for that AutoCAD file. This is thevalue stored when the AutoCAD file was first imported. If there is any mismatch in this value, Planner still loads the node butdoes not allow you to use the Manage Layers option. Planner pops up an alert to inform you about this.4.1.4 Viewing/Loading a LocationLoading the location node means opening the .spm file associated with the node. You can open only one node at a time. Youcannot view a location layout unless you load it.To view/load a location, right‐click a location node from the Locations tree and select Load Location Node. Planner launchesthe layout on the layout model pane. The title bar of the screen reflects the path of the selected location.Note: A .spm file created with the previous versions of Planner does not have any application environment assigned to that file. When youimport that file and try to load the node, then Planner pops up an alert asking if you want to assign the default application environment.