I'm not sure there's a surefire way of jumping back with your C-x commands that's built into Emacs, but here are two options: C-x C-SPC will pop the global mar

I'm not sure there's a surefire way of jumping back with your C-x commands that's built into Emacs, but here are two options: C-x C-SPC will pop the global mark which, depending on what you've done in the buffer you're visiting, can pop you right back to where you started, functioning as the equivalent of M-,. C-x b RET (C-x b with no input) should take you back to the most recently used buffer, which will usually be the buffer you started from. Not built in: It's also fairly trivial to write some defadvice that stores your point (pre-jump) to a register, so you can jump back to the register with one key.