How to force Mac screen resolution?
Solution 1:
The setting you wish to adjust is the built-in display correct? Your screenshot is for the external.
To change the built-in display on a retina screen running Yosemite:
Unplug your HDMI (as in normal use)
Go the the Display preferences ( > System Preferences)
Set the display to Scaled and More Space.
Play a bit with it to get the look you desire. Note: this may affect performance.
When connected:
