The control panel uses the Dragon interface theme. Orion theme is not supported since version 6.9.0.
You can set the default theme via the DefaultTheme parameter in the ISPmanager configuration file /usr/local/mgr5/etc/ispmgr.conf.
ISPmanager collects anonymous information about the use of Dragon theme and errors that occur while using it. This information contains only depersonalized data - the control panel does not collect field values, forms, tables, website details, etc. The information collected helps to improve the work of ISPsystem products.
You can change the theme settings through branding. For example, change the type or reduce the font size. Read more in Brand settings.