I’m not actually sure you do need to check the page range. I find that, in a file where I knowingly have some page ranges set, as long as I carry out these steps in this order, all pages of all selected layouts get exported:
- Select the layouts in the left panel.
- Wait for Dorico to think, if it’s visibly processing in the background.
- Click the All Pages button.
- Wait for Dorico to think again - it may be thinking again, dependent on how many layouts are selected and how big the project is.
- Export.