XnView Software

Thanks. Can you tell me which argument I have to set after "longest" to make my canvas square?
I''ve only found an example with argument in mm, but it's not what I'm looking for

Hi! I wonder if it's possible to resize canvas size in a square format by the longest side with nconvert command line.
I've seen the function in XnView MP, unfortunately when i export the line doesn't work (with teh .bat file)
Thanks in advance