There are 2 ways to create a new filter.
1. Click the 'Create New Filter' button at the top of the screen.
From the pop up screen, you'll select the base filter, a name for your filter and a category for the organization.
2. Another way to create a new filter
Access the 'edit' mode for any filter. This way works best if you have a filter already that has existing criteria you want to use again. Click on Edit and then select 'Save As' - this will provide you with a place to name your new filter. And you're done!