Filter to show contacts with empty fields

Here's how to filter to show contacts that don't have a particular detail saved:

• Click on “CRM” in the navigation bar to pull up the full list.
• Select "Add a filter" under “Filter” in the upper right.
• In the dialog that appears, choose a field based on what missing details you'd like to see, and then select "is empty." For example, select "Email" "is empty" to see contacts that don't have an email address saved.
• Apply the filter to see all of the contacts that don't have a value saved in the selected field.
• Want to save your filter for easier access? Learn how to save a view here.