How to set up a hex editor?

Question

hex

Good day, please tell me how to set up hex editor neo so that I can convert it from big-endian to little-endian, I forgot how I did it ( https://www.scadacore.com/tools/programming-calcul... I have 1 MB of zeros and units can reduce the day of work.I didn’t understand the documentation https://docs.hhdsoftware.com/hex/definitive-guide/...
I need to get the following result somehow:
00 00 00 00 00 17 02 36 00 00 00 00 3f 1a a6 53 big endian
00 00 00 00 17 00 36 02 00 00 00 00 1a 3f 53 a6 little
bits like swap View » Byte Order » Little-Endian it doesn't change anything, maybe a bug?