Manage Metadata
Metadata panel is used as a starting point for managing metadata for all the supported metadata tables.
To learn more about the process, check out this user guide Also, make sure to check out the relevant settings.
Metadata panel is made up from several sub-panels.
Metadata Tables Overview
It starts with the main Metadata view where you can see all the available metadata tables with basic stats about each table, including number of unique meta keys.

Unique Metadata Meta Keys
When you select which metadata table you want to manage, and click the Metadata button, you will get to the new panel for managing all the unique meta keys for the selected table.

This page is quite similar to the Options. But, metadata is aggregated list of all unique meta keys, showing number of records that belong to a specific meta key. The source for the meta key will show the detection status similar to Options.
Preview Meta Key Values
Finally, if you want to see actual values associated with each meta key, each key has the Preview button, and that will open new panel where you can see values for selected meta key connected to the reference content (posts for postmeta table, for instance).

Deleting records is possible from the Main Metadata grid where unique meta keys are displayed, or from the meta key values preview panel. In both cases, there is individual delete action, or you can use bulk selection. And, as usual, you need to confirm the deletion process via the alert dialog.