I'm using a Nexus 5 running on Lollipop 5.1, and I can take a screenshot by holding POWER and VOLUME-DOWN. However, screenshots appear to be limited by the resolution of the device's screen. Specifically, it's
1080x1920 for the Nexus 5.
Is there a way (through the use of developer tools, a specialised app, or otherwise) to take a screenshot of higher resolution?