A master list allows you to combine multiple lists into one. You can add contacts/participants from other lists, and even filter out contacts/participants from another.
Click on the add button and choose the list from which you want to add contacts/participants. You can add multiple lists.
If you have people to exclude in an existing list, you can click on the remove button. This will remove those from the final list.
Next topic: Organizing lists, forms and templates using tags
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