Unfortunately I don't have a quick and easy way as well. It's a external program that has quite extensive options to create a knowledge base after all. How I do

Unfortunately I don't have a quick and easy way as well. It's a external program that has quite extensive options to create a knowledge base after all. How I do it, is, that that I make flashcards in bulks. I don't go back and forth to create a card here and there - like you mentioned, that is disrupting to the work flow - but rather make a reminder for later. If it's a non-fiction book, you'll have to go through it more than once either way. But yeah, not a quick and easy fix...