saving manually after making any changes

Unity Engine
1

I’d like to know if it’s possible to save manually after making any changes. I followed along a project great until I accidently hit some button then my output changes. Then from that point on I can’t redo to where the good code was. Any setting in Unity that allow me to change to manual save?

Thank you.

2

Only Ctrl+S for current scene.
Just make backup of your project folder once in several days or don’t delete old assets until you are sure that new is ok.