Created attachment 139592 [details] Screenshot of partitioner SUMMARY The partitioner will not accept custom mount points - that is, not from the dropdown list - without a non-intuitive procedure. STEPS TO REPRODUCE 1. Run KDE neon installer 2. At the partitioner, choose manual 3. Select a partition 4. Type a non-standard mount point, e.g. /data OBSERVED RESULT The name does not "stick". See the screenshot, which was a second attempt to edit the existing entry by typing /data into the field. EXPECTED RESULT The name should go into the partition table. SOFTWARE/OS VERSIONS KDE neon v5.22.1 ADDITIONAL INFORMATION To make the name stick, do this: Choose / from the dropdown list of names Put the cursor to the right of the / Type the remainder of the mount point name This is a minor bug but can be frustrating. The solution is not obvious and in some cases may cause the user to choose another distro.
This is an issue in the Calamares installer; you should report it at https://github.com/calamares/calamares/issues/