 What do we use you for in Vim? Well, we use it to undo. It undoes stuff. Hey, welcome back to another video on Vim covering A to Z, the Vim alphabet. I'm Chantastic and first, I need to apologize for how long it's been. I said in the last video, I'd see you tomorrow and it is a week later. February is like a notoriously bad month for me. It's the month my dad died. So we kind of like do some family stuff during all this week and then like it's a Valentine's Day and I'm a bad planner. So I have to spend extra effort setting all that stuff and all my coworkers are in town. So all the time that I don't spend commuting or socializing all that gets packed into this one week and there's just a lot of festivities and craziness and yes, this last week was kind of chaotic. But back back on normal routine and we're going to start with you start the end really. We have you and some other letters about 5-ish. I don't know. I have always had to count my way through the alphabet. Anyway, you is extremely important because it undoes. Now today I'm going to talk about you, capital U and then redo, which is kind of the opposite of you. It's a command that we wouldn't cover in the alphabet because it's guarded by control but I'll show you all that. So let's jump into our editor. Today we're going to open the quick Brown Fox file which has five lines each with the text the quick Brown Fox jumps over the lazy dog. Now what I can do is if I do R, which we use the other day and change this to a lowercase t, I have made a change. Now that change is undoable and I can undo it with you. Nice and easy. So that's spelled there is to you really. There's some kind of complexities around it but that's that's how I use it all the time is just hitting you to undo. If I do multiple changes. So let's change a couple of these. I can step back through those by hitting you multiple times you, you, you, you. Now, if I want to redo something I can do control and R and I can do that multiple times as well and that will step through all of my changes. So we can use you to undo control R to redo and those will go back and forth through your history and there's one thing that's really interesting if you do a capital U or shift you it will undo all of the changes on a line. So we'll do that now. We'll hold down shift and you and it resets that line. Now if you need help or you'd like to find out some of the more advanced usages of this you can do issue the command colon help or colon H and give it the letter U that will give you all of the documentation for you and talk about how the history works what you can expect when you're doing that whole like replacing a undoing all the changes on a line, etc. It also talks about this control R and this is one of those like VIM only type of commands. So this is kind of one of those areas where you have the difference between VIM VI. So that's all we got for today. If you have any questions you can hit me up in the comments or post some links that you use you that we didn't cover here today. Thanks so much for watching. We will cover V tomorrow and I promise it'll actually be tomorrow.