Are you talking about "column selection mode"? It exists in several editors, SlickEdit for example, and lets you select "boxes" (or columns) of characters. My

Are you talking about "column selection mode"? It exists in several editors, SlickEdit for example, and lets you select "boxes" (or columns) of characters. My favorite editor nowadays is Sublime Text, which takes this concept much, much further. It allows having several cursors active at once, each one behaving like a real cursor, so you can do things like ctrl+right to move all the cursors to the next word, no matter the length of each specific word. Kinda like real-time macros, only much better.