Size column format

I'm sure this is something simple that I'm missing but I've gone through all the Preferences and the Help file and cannot figure out how to get the Size column to list just bytes without KB/MB/GB.

Can some kind person point me in the right direction?
Many thanks in advance!

There are separate columns for different formats.

Use the Size (bytes) column instead of the variant you're using now.

There's also Button: Toggle size format if you want to use one format but occasionally switch into another.