Display a description of what register r contains. Saving text in registers. Saving rectangles in registers. Saving window configurations in registers. File names in registers.
Bookmarks are like registers, but persistent.
Saving Positions in Registers Saving a position records a place in a buffer so that you can move back there later. Moving to a saved position switches to that buffer and moves point to that place in it. To save the current position of point in a register, choose a name r and type C-x r SPC r . The register r retains the position thus saved until you store something else in that register. You can jump to the saved position any number of times.