I have a multiboot system. In the dialogue where you can select which partition to boot, you can't edit anything. Boring. This was text mode install.
You should be able to edit the labels that each entry has. I am able to do this in the lab with no trouble. What exactly are you seeing?
I mark a label and then select Edit. However, there are no respons at all. I can of course press Continue and the installer continues, but I can't modify anything so the dialogue is meaningless.
If this is in GUI, then clicking on a partition will allow you to type in the label field just above the partition list. If there is already a label, then this label should appear in the dialog box and you should be able to edit it. In TUI mode, a separate subscreen actually appears in which the user is allowed to edit the label assigned to a partition. Please reopen this bug if you are still seeing problems. In addition, if you are still seeing problems, please send details about the type of installation.
Ok - I tried this ones more and realised that I had selected Norwegian as install language when this happened. Also I used TUI and Gnome Server/manual partition/Disk Druid/. Can you reproduce now?