Use different fonts for the levels in the hierarchy to make them more distinct
It would be great for easier differentiation to make the font larger for higher level issues in the hierarchy. E.g.
Level 0 - H1 Bold
Level 1 - H2 ...
Level 3 - H3
Thanks for your suggestion! While we don't have this feature currently in our plan, we plan to enable customized CSS, which a JIRA admin or maybe a JIRA user would be able to set up for the JIRA instance / themselves. This would allow adding this kind of customization.
Please vote/watch https://jira.almworks.com/browse/HJ-648 to stay updated about the progress.