Map to optional variables Several activity templates offer a list of optional variables that you can pass to the host. Before you beginRoles required: activity_admin, activity_creator About this task In most cases, the list allows you to define the variable and a value only. Procedure Use the following controls to populate the list: Click the add icon + to add new rows to the list. Click the delete icon () to delete a variable from the list. Click the clear icon () to clear the contents of a row without removing the row. To see a complete variable name if it is not entirely visible in the field, point at the value to display the name in a pop-up window.