8.4 Clocking Work Time
Org mode allows you to clock the time you spend on specific tasks in a project.
C-c C-x C-i (org-clock-in)
Start the clock on the current item (clock-in). This inserts the
'CLOCK' keyword together with a timestamp. When called with
a C-u prefix argument, select the task from a list of
recently clocked tasks.
C-c C-x C-o (org-clock-out)
Stop the clock (clock-out). This inserts another timestamp at the
same location where the clock was last started. It also directly
computes the resulting time in inserts it after the time range as
'=>HH:MM'.
C-c C-x C-e (org-clock-modify-effort-estimate)
Update the effort estimate for the current clock task.
C-c C-x C-q (org-clock-cancel)
Cancel the current clock. This is useful if a clock was started by mistake, or if you ended up working on something else.
C-c C-x C-j (org-clock-goto)
Jump to the headline of the currently clocked in task. With
a C-u prefix argument, select the target task from a list
of recently clocked tasks.
The l key may be used in the agenda (see The Weekly/Daily Agenda) to show which tasks have been worked on or closed during
a day.