How Does M In Vim Differ In Normal And Visual Mode?

Oh man, marks in Vim are deceptively simple until you start mixing normal and visual mode — then they feel like a tiny secret language. In normal mode, hitting m followed by a letter (for example ma) sets a mark named 'a' at the exact cursor position. Lowercase letters a-z create buffer-local marks: they stick to that file and let you jump back with 'a (to the start of the line of the mark) or `a (to the exact column). If you use an uppercase letter like mA, you're setting a global mark: uppercase marks remember the file name too, so you can jump to that exact spot even from another buffer. One neat trick I use all the time is setting a mark before I start a risky refactor or a long move sequence, then using ` or ' to hop back. Also, marks can persist across sessions if you have viminfo configured to store them, which is lifesaving when a project spans days or weeks.

Visual mode is where folks sometimes get tripped up. Pressing m in visual mode still sets a mark at the cursor, but remember that the cursor in visual mode sits at one end of the selection. So if you select a block of text and the cursor is at the end, ma will put mark 'a' at that end — it doesn’t magically set both ends for you. For working with selections you’ll usually want to rely on the built-in visual marks '< and '>: these are automatically set to the start ('<) and end ('>) of the last visual selection and are super handy in commands. For example, :'<' , '>' yank will yank the last visual selection in ex mode. If you want a named bookmark for a selection, set a mark on one end with m and maybe another mark on the other end, or just use '< and '>. Jumping back to a visual boundary with `'< or `'> lands you exactly where the selection began/ended, which is unexpectedly satisfying when you’re juggling multi-line edits.

A few practical patterns I love: if I need to yank a region to reuse later across files, I’ll visually select the region, then set mark 'a at the start and mark 'b at the end (quickly with ma and mb), and then use :'a,'b y to yank that range into a register. Another favorite is using uppercase marks like mA before closing a file — I can reopen a different buffer and jump back to that spot anytime with 'A or `A. Also, remember the difference between ' (single quote) and ` (backtick): ' goes to the first non-blank of the marked line, ` goes to the exact column — that tiny distinction matters if you care about column positioning. Once you play with these a bit, m becomes less of a mystery and more of a tiny anchor that saves you from endless searching. If you want, I can run through a couple of short, concrete command sequences to show these tricks in action next.