9.4. Jump Using CTRL O and CTRL L - shinokada/vimnotes GitHub Wiki
To view the jump list.
:jumps
# go back to the vim by hit enter
# from the normal mode
<C-o> # jump back to previous spot
<C-i> # jump forward to next spot
5<C-o> # jump to location 5 above location #0
5<C-l> # jump to location 5 below location #0
You need to type 5<C-o> in the normal mode. Not in :jumps list.