You can search for all occurrences of a variable in activities and links by using the

Find Where Used

right-mouse menu from a variable in the Process Variables list.

You can also search for all variable used in Copy operations. To search for occurrences of the variable in Copy operations, select Find Where Used from the Copy right-mouse menu on a variable, as shown.

Process Developer displays the search results and highlights the first result in the Process Editor canvas and Outline view. From the Outline view, you can select an activity, link, or Copy operation for editing.