Here are the steps that you can create filters for all the objects and have them available in the properties pallete and also turn them on and off like CAD Layers
1. Under the manage tab click on shared parameters and create 3 parameters :
• M-HVAC-Supply-New
• M-HVAC-Supply-Existing
• M-HVAC-Supply-Demolish
2. In the parameters properties window change the parameter type to Yes/No
3. Click on project parameters and click on Add, change the type to shared and select the above shared parameters one in a time
4. Change the group parameters under to layers and click on check all
5. Under the view tab click on filters
6. Create new filters using the same layers names and click on check all and select the parameter from the filter rules list
7. Add the different filters in the VG window to a view
8. Change the color and the line type to each filter
9. in your view select the ducts and click on the check box for each filter to turn the filter on
10. you can change the duct display based on the layer
