Problem importing large PDFs

a lot of pdfs i have tried to import consolidate the entire book into one or two lessons, which makes the app function extremely slowly. is there a way to fix this?

Lessons are split in parts automatically, and recently we increased lesson limit from 2000 to 6000 words. At the moment, it’s not possible to change that limit manually.

I’m very grateful you increased the word limit. The prior limit was splitting up chapters of my reading content, but 6000 words is a reasonable limit for most material.