Trunk has an aspect ratio limit for docking, but that's still work in progress. There's supposed to be some UI in the future that allows to toggle/change it. For now you can do this:
gsettings set org.onboard.window docking-aspect-change-range "[0.0, 10.0]" -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to onboard in Ubuntu. https://bugs.launchpad.net/bugs/1586493 Title: "Expand on landscape screens" option not working in trunk Status in onboard package in Ubuntu: New Bug description: "Expand on landscape screens" option not working in trunk, revision 2152. Ubuntu Gnome 16.04 x86_64. Gnome Shell 3.18 1920x1080 screen. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/onboard/+bug/1586493/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp