Issue & Event Appearance
ActivityTimeline Admin users have the possibility to manage the appearance of the items on the timeline panel as well as what information to display on those items.
In Configuration → Issues → Issue appearance you can choose which icons to display on the issue bar, so hide everything that is not important to you:
You can also display 3 additional fields on the issue bar, these can be fields like Assignee, label, Component, and Jira Custom fields:
The same can be configured for Local Events in Configuration → Events → Event Appearance: