Creating a linear link is very straightforward. Open the Model > Link menu and choose your A and B parameters to be linked. Recall that Parm B is the driven or dependent variable in the relationship. You may choose to set a Scale and/or Offset at the creation of the Link as well as any constraints on Parm B. Click Add Link to create the link and update the model.
To modify a Link, click on the Link in the Parm Link List and then alter the relationship using the activation buttons or entry fields.