Hi,
you can "reset" the Finder by deleting the preferences file.
In Finder, menu bar, click on the "Go" menu, press the Option key, then click on "Library".
In Library, go to the Preferences folder, move the com.apple.finder.plist file to the trash.
Now log out (/Log out) and log in back : the Finder is "as new".
Simplest way : create a NEW account (System Preferences / Users and groups).I decided to create an installation guide after I had started customizing my new Mac.
I would like to get the Finder window, Dock and Desktop as they were right after I ran the Setup Assistant.
Yes sure, but creating a new account would be much more helpful IMO.
You could keep your existing account, and test what you want in the new one without modifying your own account.
No harm at all, and it is recommended to have more than one account, in case something goes wrong in your account.If I create a new admin account, could I do any harm to my Mac, or leave behind any junk that I would later regret?
No harm at all, and it is recommended to have more than one account, in case something goes wrong in your account.
Also you can delete an account if you no longer need it : this erases ALL its content.
OP:
You are "thinking too much" about stuff that's really not important.
You can always go to the "out of the box" look by creating a new account, as mentioned above, but…
… why bother?
Personal settings don't really change too much "down below"...