"I" (capital letter i) is bound to org-agenda-clock-in. You can check binding in your installation via describe-function:
C-h f org-agenda-clock-in In the agenda buffer, you can check what is "I" bound to: C-h k I .j. On Sat, Jun 20, 2015 at 06:30:17AM +0100, Sharon Kimble wrote: > What is the symbol/glyph or whatever for clocking in on a task in the > agenda please? The menu says that it is "I", yet whatever I press on > this UK keyboard I can't find it! I've tried I, 1, !, and even |, > but none of them work! I can clock out okay using the keyboard, but > just not able to clock in from the keyboard in the agenda view. > > Is it possible to customise it please to something that will work > here? I've looked in all the org-agenda customisation files that I > can find but can't see where I can change it from.