- Make a back-up copy of the property map file you wish to customize. This is likely to be the file: C:\Program Files\Autodesk\Navisworks Manage 2015\Quantification\TakeoffPropertyMap.xml, or an Autodesk Navisworks 2014 or 2015 xml property map of your choice. This means you can revert to the original file if necessary.
- Open your model in Navisworks.
- Click
Home tab Select and Search panel Find Items 
. - In the left navigation pane, click your model (as opposed to individual objects).
- In the Category column, select Item from the drop-down list.
- In the Property column, select Creator from the drop-down list.
- In the Condition column, select Contains from the drop-down list.
- In the Value column, select Revit from the drop-down list.
Note: this example uses "Contains" "revit" (instead of "Equals" "LcNwcLoaderPlugin:lcldrevit") intentionally to have it applied for both .rvt file and Revit exported .nwc files, since Revit export .nwc has the property of value "nwexportrevit".
- Click Export and save the xml file locally.
- Right-click the xml file Open with Notepad or similar text editor. The xml file will look something like this:
- In your xml file, copy the lines of code that correspond to the condition node highlighted in yellow above.
- Open the property map file here: C:\Program Files\Autodesk\Navisworks Manage 2015\Quantification\takeoff_maps\TakeoffPropertyMap.xml (or use a file map template of your choice). Paste your copied text into the property map file (find and replace the existing condition node if it is visible in the file).
- In the property map file, locate the code <TakeoffFileMap Name="Revit file map">, and change the text Revit file map to any other name you wish to use for the TakeoffFileMap.
- Save your property map file in the file path: C:\Program Files\Autodesk\Navisworks Manage 2014\Quantification\... If you close and reopen Quantification in Navisworks, your customized properties will be picked up automatically.