Just moved from Unity to GNOME with the update to Ubuntu 17.10.
There is a HUGE amount of wasted space at the top of the screen, when an application is open.
Evolution and Firefox both have four "bars" with 90% of each empty. Unity, to its credit was able to blend / mix these horizontal bars so there was only one / two.
Four is way too much. If this is GNOME I may carry on with Unity for the next six months.
Can anybody suggest a tweak/change/fix for this?
Best Answer
You may try one of following GNOME Shell extensions to get rid of the title-bar of a maximised window:
No Title Bar (an actively maintained fork of Pixel Saver with customisation options)
Pixel Saver
Note that Pixel Saver is not actively maintained anymore, therefore has a lot of unresolved issues like this one and doesn't offer any customisation options.
Other similar extensions (including forks):
You can even go further and hide the top bar following this answer by solsTiCe from this Q&A: Auto hiding top panel in 17.10 GNOME 3.26.1.
Also, you may move the menu bar from an application window to the top-bar ("Activities bar") following this Q&A: Ubuntu 17.10 windows' menu in panel.