The possibility of batch exporting to cvs the selected libraries.
I have several (more than 15) libraries linked, making my small business database. And it's a bit tedious export one by one to csv.
I think it would be fine if I could select all (or a group of the libraries) and export them to *.csv in a folder of my choice.

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Daniel Schudel commented
To tack on my ideas -
I need to access my Memento libraries in R under Linux/PC. Exporting each library as a CSV is tedious and time consuming.
I would like to see a single action that exports all libraries to a single text file. That single text file can be divided into a separate section per library. Each section would be the CSV export of a single library.
Even better, would be an option to "share" that exported file to the usual list of share targets (email, google drive, etc.).
This feature is currently holding me back from switching to Memento from PortoDB.