In the 12.11.0.95 schema browser in the schema name dropdown, the logon schema is separated up top from the rest of the list. I frequently am unable to find the logon schema while visually searching the list because it part of the alphabetized list. It would be preferable to present the schema names in a single list with the logon schema bolded and selected perhaps.
This was added in version 13.0. Rt-click -> Customize -> uncheck “Enable Schema Categories”
As a shortcut, if you are looking at some schema that is not the login schema, and then you want to return to the login schema, just right-click. It’ll be the first item in the popup menu.
13.1 is the current version, jump up to that one if you upgrade.