Quick question regarding a ctrl command on MacOS

Hello everyone!

I just began using Obsidian (on MacOS) and I face a problem with a default key combination, namely: ctrl+a. It moves the cursor at the beginning of the line, while I need it to be free, for I use it for a special sign in my native language. Could anyone help me in unassigning this key combination? Thanks a lot!

Things I have tried

It does not appear nor can be changed under hotkeys or elsewhere in app.

What I’m trying to do