My chain was rubbing on the front derailleur when in the higher gears. It was a new noise, not very severe so I tinkered with the limit screws and fixed the problem.
I realized afterward that I was actually lucky. My screws are clearly marked, but I don't really know which screw moves the derailleur in or which moves it out.
I don't even know the terminology, so my explanation is poor.
If someone can explain these screws or link me to a video I would greatly appreciate it.

Park Tool has a couple of articles on their website which will walk you through it as easy as pie.

I recently did my first full build up and had never installed or adjuster a dérailleur in my life and the Park sight had me fixed up in half an hour front and back.

The limit screws control how far in toward the center of the bike (low limit) and how far out from the center (high limit) the front derailleur can move. Be very careful if you adjust these as going too far can allow your chain to fall off the chainrings.

You don't want to turn the limit screws to adjust the derailleurs. These limit the total distance that your derailleur can move. They are for preventing the derailleur to move too far and pull the chain completely off the gears.

What you want to adjust is the barrel adjustment. I had something similar in that I am mostly on the middle chain ring on my hybrid and when in the top gears in the rear, the chain rubbed a little bit on the front derailleur. Since if I ever use smaller gears I just go to the small ring, I gave just a quarter turn on the barrel adjustment on the front derailleur and that moved the derailleur just enough to no longer rub when I was in higher gears in the 2nd chain ring.

Exactly what Blues Dawg and Mr. Rodgers said, go to You tube and find the Bike Radar, or Park Tool video channels for the tutorials on derailleur adjustment and indexing. These are good, clear instructional videos that have helped me simplify these operations. Too many cyclist have done just what you had narrated in your post, in using the limit screws, thinking that these adjust the derailleur's position in relation to the cogs. The barrel adjuster, and if your cables have them, the inline adjusters, are for this procedure. I like to set the in-line adjusters completely in when I am indexing either derailleur and set up things with the cable tension, and the barrel adjuster, on the rear. That leaves the in-line adjustment for fast adjustments, from the saddle, if you should need.

Here is a link for the Bike Radar video, on You Tube:https://www.youtube.com/watch?v=On57Tl9qYRM Hope this helps you out the next time you need to do the setting or indexing of the RD, or FD.

Bill

Several days ago I replaced the chain and also cleaned the drive train of accumulated grit and grime. Then, during the Sunday club ride, the bike would not drop into the bottom chain ring. This malfunction was really inconvenient as the ride was very pretty but had many rollers, as few quite steep. I found later at home that I'd inadvertently turned the low limit screw enough to prevent the derailer from moving inward enough. Easily fixed once I'd calmly thought about for a few minutes.

A long Long time ago I grabbed a 12 pac of beer, Had a Pizza delivered, got my bike up on the rack and called a buddy that worked in a bike shop.

Asked him to teach me gear adjusting, crank and head set adjusting and rim brake setup,, he did, I drove him home

Thanks for the link to the bike radar indexing vid....great stuff

Dive in guys, it isnt rocket science. On the limit screws, I never can remember which is for which so I just end up looking at the design mechanics and figure out from there.

Get the right tools and get busy. You just might find something else to do when you cant ride and have the time. Not to mention the peace of mind during long rides.