Currently it’s not possible to edit the cards during the review, it would great if the editing is enabled in the card review interface, making it possible to implement incremental reading/writing using logseq.
For more information regarding incremental writing, please refer to the link below:
A workaround at the moment might be to click on the bullet on the card to go to the underlying text, exit from the card, edit the text, then go back into the cards when you should (hopefully) go back to the same card.
A bit fiddly, but it seems to work. Easier would, of course, just be to make the card text editable.
You can shift+click the block bullet to open the current card in the right sidebar, this way, you don’t need to exit from the card and go back to the cards.