Saving Positions in Registers
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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.
`C-x r <SPC> R'
Save position of point in register R (`point-to-register').
`C-x r j R'
Jump to the position saved in register R (`jump-to-register').
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.
The command `C-x r j R' moves point to the position recorded in
register R. The register is not affected; it continues to hold the
same position. You can jump to the saved position any number of times.
If you use `C-x r j' to go to a saved position, but the buffer it
was saved from has been killed, `C-x r j' tries to create the buffer
again by visiting the same file. Of course, this works only for buffers
that were visiting files.