XnView Software

When using add folder for batch processing of file only some are picked up, In my case dds files aren't detected.

Anyone know why this is the case/is there a work around for it (outside of doing it manually)?

'add folder' only add most used format

Is it possible to add/change which it file types it can pick up?

being able to pick a folder and grab all the file is way easier than going into all the sub folders to find the files