The windows content (for compliant applications) is scaled according to the "Scale all windows contents" setting in the Ubuntu Control Center. This is set by default to match the menu and title bars scale setting for the monitor with the smallest scale factor, but is selectable through the drop-down menu to choose another monitor or matching rule specifically.
The content scale factor is not dependent on a "primary" or "secndary" screen. If the problem you are reporting is in the third-party "Unity tweak tool" you need to report it to the developers of that tool. ** Attachment added: "screenshot of Displays panel in Control Center" https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1343971/+attachment/4158362/+files/Displays_001.png -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to unity in Ubuntu. https://bugs.launchpad.net/bugs/1343971 Title: Scaling for high DPI mixes monitors Status in “unity” package in Ubuntu: New Bug description: The scale factor of the primary screen only affects menus and titlebars (as expected, so far). The scale factor of the secondary screen affects menus and titlebars, PLUS application fonts. This behavior, in addition to not agree with the scale's label, is hard to handle. PS : I didn't touched unity tweaks. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1343971/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp