I didn't even know this was possible, until I found out by mistake!
I kept using the "source folder" option, because I did not want to save my converted files to the same folder on my drive every time. Images exist in different albums and folders, so I was hoping there was a way to save the converted files into a relative output folder.
Guess what? It's possible! I just never knew because it was not explained!

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This works on Linux, and I assume it is the same with Windows? New users might not know that XnViewMP's batch convert even supports "relative output folder" since no hints are provided.
