Is there keyboard shortcut to save without changing the file date

hi,

sometimes, i need to update the mp3 tag but i do not want to change the file date.
is there a quick key to witch on/off the modification of the date when we perform CTRL+S ?

thank you for your read, and help.
Best regards

there is no shortcut.
You have to set it in Tools>Options>Tags

hi,

i know this option but, does mp3tag have a way to add a custom action/macro in his tool bar to switch it on/off ?

No. See e.g. the help for available shortcuts:
http://help.mp3tag.de/main_keyboard.html