The normal setting, plus Maximized Size
When you maximize Total Commander, the ButtonBar icons will be set to the "Maximized Size" and when you restore/un-maximize TC -- the icon size will be reset to: "Size".Size: [24]
Maximized Size: [32]
I find when I un-maximize TC the buttonbar has to wrap, so I used to manually adjust the IconSize. I wrote a snippet of AHK code to automate it, but it's messy -- It requires opening the buttonBar dialog: as I couldn't get Total Commander to recognize an INIWrite/change in wincmd.ini directly for that setting.
If there was a command to tell TC to reread it's ini-file that would work (but there isn't) :: We could tell TC to Save the INI file. Make the change. And indicate that TC should reload the wincmd.ini