Please note adding a name to a feature will override any assigned use that shows in the expanded plan in the left-hand panel.
Select a feature (or multi-select using the shift key) and the feature details menu will appear. Click on the 3 vertical dots next to name and select edit.
Input the name, if you want to show on the plan check the show on map box and click on the tick.
The name you have given the feature will now appear under the expanded plan view.