Improved
The 12-lead inspect box compares a lead with normal, and colours the QRS by the part of the heart that drew it
Before
Tapping a lead showed its wave and its measurements, but not what the condition had changed, or which part of the heart each wave of the QRS came from.
After
A Normal button draws the same lead without the condition in grey behind it and lists what changed, such as rS becoming rSR′ in V1. The QRS view colours the septum, the left ventricle and, in right bundle branch block, the late right ventricle, and says which wave each one draws in that lead.