To assign a lawyer to a law firm, the user needs to direct their attention to the menu on the far left hand side of the screen, scroll down and select common databases. 

Select the law firm, and click on the law firm the attorney is to be assigned. 

This will bring you to the display screen of that Law Firm and the currently associated Lawyers and Associated Cases

Click the green pencil icon on the top right side of the screen. 

Next scroll down to Lawyers at this firm, and click the blue + icon on the right hand side of the screen. 

Click on the attorney to be assigned to this law firm, Select the lawyer and then click the green select button at the bottom right hand corner of the screen.

The assigned Lawyer is displayed appropriately: