You can expand items to see more information about the item. The item detail view will also show you comments and activities related to that item.
In list, Kanban, and calendar view, click on an item to open the detail panel. In table view, click on the arrows icon to the left. In mind map view, double-click the item (a single click selects it to use mind map shortcuts).
The item title is displayed at the top, and item fields and activities are displayed below.
The detail panel can be re-sized by dragging the left-hand edge.
You can also view item details in a popup instead of in the side panel. To use popup detail view, click on the "..." icon in the top right-hand corner of the panel, then on "Show as popup". To return to the panel, do the same except click "Show as panel".