By Xah Lee. Date: 2016-04-07. Last updated: 2023-09-05. Often, you need to go to a previous position in a buffer. Emacs has a buffer mark ring that records mark positions and lets you jump to it. Mark and Jump to Previous Mark set-mark-command 【Ctrl+Space】 Mark a position. (do it twice to remove the highlight.) This pushes current position into the mark ring. 【Ctrl+u Ctrl+Space】 (set-mark-command)