E2B sorts payload files alphanumerically, so Ubuntu.iso will be listed after Tails.iso in the E2B menu.
E2B also supports filename prefixes in the form of _*_ (underscore - any number of characters - underscore), e.g.:
_100_Ubuntu.iso
_110_Tails.iso
These will be listed in the E2B menu as:
Tails
Ubuntu
File extension override suffixes
You can also add file extension override suffixes, these too will not be displayed in the E2B menu system, e.g.
Format: _ (file extension _ [agfm (agfm file extension)] . file-extension
_100_Ubuntu_.isodef_agfmisoagfm.iso
_110_Tails_.isodef_agfmismap.iso
The agfm file override is optional. If not specified then the first file suffix will be used for both E2B and agFM - e.g. _100_Ubuntu_.isodef.iso.
These will be listed in the E2B menu as:
Tails
Ubuntu
BUT both agFM and Ventoy will list the full filename.
E2B will boot as if the file had a .isodef file extension, agFM will boot as if the file had a .isoagfm (or .isomap) file extension.
Note: If E2B MyE2B.cfg is configured to show the file extension (EXTOFF) then E2B shows the whole filename but without the prefix - e.g. Ubuntu_.isodef_agfmisoagfm.iso.


