Once I was trying to install a mod manually into forum theme and and my forum theme became corrupted. The home page just wouldn't load anymore. Thankfully, I had a copy of the page open (the one i'd been editing before) and simply copy/pasted the section that had been deleted back into the proper area and clicked save. There was a few tense moments, but I didn't freak out and things worked out fine. Did you ever mess up your forum theme trying to edit to insert code? How did you rescue the situation? Did you have to upload another copy of the theme?
I've had it happen many times, but often I can tell what happened and fix it easily since I know HTML.
I have done this so many times, but the good thing is that I know how to reverse what I did and I know basic HTML so I can easily fix it
I make most minor edits in real time, straight to the live board. I am fairly confident with my HTML and CSS abilities so that isn't a big issue for me. Most of my styling changes are just CSS so that is easily reversed.
When i work on something, there's always a big chance it might get broken That's why i always backup files before starting the work.
Same here. I usually break my installation once if I'm coding live, but that's all in the fun for me. Then I get the opportunity to go in and then fix it, find out what caused the error, etc.
You need to duplicate theme and make child themes of the them you want to edit if your software enables you to do that or do it on a localhost using Wamp or something like that.