You can add properties to a call list from either the Pipeline, Appraisals or Listings modules.
If you filter your search for your properties in the appropriate module, then you can either select the properties individually by clicking on the circle beside their name or alternatively, you can "select all" using the button at the top of your property list.
Once the properties you wish to add to a call list are selected, select the Actions button and click on "call list".
You will now have the option to either add these properties to a new call list, or alternatively, you can add these properties to one of your existing call list by choosing the appropriate tab.