Copy all your ISOs to the USB drive (or delete them). The menu is created automatically each time you boot. To UEFI-boot, you must first convert the ISO (or USB drive or zip file, etc.) to a .imgPTN file and then load that from the E2B menu system. Highly configurable. Boots 99% of all ISOs including Windows Install ISOs.
Ranked in these QuestionsQuestion Ranking
Pro Supports multiple Secure Boot UEFI by 'switching-in' different image files
Pro Easy2Boot is a multiboot USB drive
Rufus and Etcher are single-boot.
Pro Direct UEFI-booting from ISOs, WIM files, Win Install ISOs, VHDs, .imgPTN files
Secure Boot works for most payloads.
Con Not Open Source.
Author amalgamates his content with the content of others. It's not Open Source and may well have closed source and copyright restricted content.