Question

Is it possible to split all pages for a batch at once from the web UI?
So, to split all the documents in a batch into lots of single-page documents with a single click.

Answer

Currently, there is no such feature available in FlexiCapture.

As a workaround, it's suggested to implement a custom workflow stage with a script splitting all the documents in a batch into a single page and sending tasks from Verification to this stage if required.
More regarding custom stages: Scripts for customizing processing stages (abbyy.com)