Changing my screen resolution

I have a new laptop which has a screen resolution of 3840 x 2160. Yesterday I installed Ubuntu on the machine. The icons and taskbar and text etc. are really small and I want to make them bigger.

I know I can do this just by changing the resolution in the settings until I find a display I am happy with, but I'm wondering if that's the best way to do it or whether there is a more appropriate way.