You can find the dispatch page by clicking on the name of the event in the left-hand sidebar.

At the top are the event details, edit by clicking the pencil button.

Jobs

In the middle of the page is a table showing all of the jobs associated with this event.

You can manage crew allocation and timings, and add notes to the job without leaving this page.

Expand the job details panel by clicking the downwards pointing caret at the left of the job:

From this panel you can modify crew result and timings, as well as reading and adding text notes. Your updates will appear almost instantly for anyone else who is viewing/editing the job.