The 'Others' tab has been taken out of the Advanced configuration dialog. It has proved useful in the past, so we might want to consider bringing it back, although:

1. It should live within the Settings dialog (make it the last tab)
2. It should be redesigned so that users can choose from existing Bitbake variables and their valid values (in its previous incarnation, the tab only provided blank text input fields and relied on user's memory and knowledge to provide valid variables and values).