Live View Axis Top ((better)) -

Mastering the Lens: A Deep Dive into "Live View Axis Top" Photography and Videography

Before the dominance of mirrorless cameras and DSLR Live View, photographers relied on optical viewfinders (OVF). While OVFs are bright and lag-free, they suffer from coverage issues (usually 95-98%) and a lack of real-time axis data. You could not see the impact of tilt-shift adjustments or the exact vertical convergence until after you took the shot.

1. Surveillance and Security Cameras (Axis Communications)