In Revit®, open the COMSOL Parameter Selection window by clicking the Parameters button () located on the COMSOL Multiphysics tab. The window lists all mass parameters in the active project. To link a parameter to COMSOL select the corresponding checkbox in the Add to COMSOL column. All types of dimensions can be selected, but only dimensions that are not defined by a formula are possible to control from a COMSOL model. Linking dimensions that are defined by a formula enables using their values in COMSOL model definitions.

Select the Save settings in project checkbox to save the list of linked parameters in the file.