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

The list of linked parameters will be saved automatically in the AutoCAD® file the next time you save the file. To reload the list of linked parameters from the saved file click the Revert to Saved button. Confirm your changes by clicking the Done button.

For additional information about parameters in CAD files see the AutoCAD® documentation.