For close-ups, use Macro sce​ne mode in HTC

This might seem obvious, but unlike a lot of modern phones the HTC One doesn’t automatically switch to macro focus mode when you target a close-up subject. So to take in-focus close-up shots, you’ll need to go to the main camera menu, tap the triangle under “Scene” in “Photo capture mode,” then select “Macro.” Note that when you quit out of the camera app, the scene mode will default back to “Normal.”