If not otherwise configured the summary panel will automatically be based according to the Global Summary Panel Settings or the Summary Panel Project Settings.
Individual issue configuration can be completed from any Summary Panel in any issue view. Click on the Epic Sum Up cog icon to configure this Summary Panel.
Any configurations at this level will only appear on the specific issue that you are customising. All configurations at this level will override ANY other configuration.
For configuration options of progress bars, you can have a look at this page.