Pool Sources
To see all your sources in Pool, including Studies, CSV Uploads, and Opt-Outs, head to Pool › Data › Sources. You can delete CSV Uploads and Opt-Out Lists from this page. Studies can't be deleted as a source, but see below for how to hide studies from appearing in your Pool.
The Source Dropdown
This is your top-level filtering mechanism in Pool. Think about this dropdown as " where did these people come from?" For example, if you quickly want to see respondents from a single upload, click the source dropdown from the top left, and then type the name of that CSV Upload. Now your Pool will only show members from that source. You can email, tag, or even save as a segment.

You can then search for a source, such as a single study, by typing in the Source dropdown. For example, typing “phone” brings up “Phone Interview Screener,” and selecting it shows only responses from that source.