Volume is a different job from a pretty album
Batching here means throughput: chapter scans, warehouse inspections, event dumps where you need documents fast. You are not designing a lookbook. You are emptying a folder into PDF pages before your battery dies. The tool still runs locally, which is why a phone can stutter — that is your hardware encoding many 12 MP frames, not a queue ticket on our side. Preview page order if the stack must read left-to-right. If narrative order is the product (portfolio, trip booklet), switch to the merge spoke; that page is about sequence as a feature. If you only needed JPEGs for a DAM, do not wrap PDF at all. Keep similar sizes together when you can. Mixing a screenshot with a 48 MP still in one document works, but the PDF will be as heavy as the largest pages. Do inspection sets on a laptop when the count climbs.