I have always wondered about not being able to "label this first extension" which
sda5 for /home and sda6 for LMDE3-Cindy
so I did a right click to see what is available here to help me visualize just what this partition is for.
especially when viewing Gparted from a different OS on the same PC.
so, in this picture, it shows a lot of Flags that 'could be' assigned to the extended partition.
were I to choose one of these, what effect would that have, and why would I want to do so anyway?