Numbers software designers should know
8.3 ms = one frame at 120 Hz
16.7 ms = one frame at 60 Hz.
100 ms = response feels instantaneous
200–300 ms = transitions feel snappy
300–500 ms = transitions feel deliberate
1 second = delay interrupts thought
10 seconds = waiting loses attention
44 × 44 pt = comfortable minimum touch target
4.5:1 = minimum contrast for ordinary text
3:1 = minimum contrast for large text
45–90 characters = comfortable body line length
1.2–1.45× font size = comfortable body line height
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@KusemaShepard@advocatemahere But at the end of theday,a captain who takes off without sufficient life saving devices is liable for the disaster. These are lives. A doctor who operates with used blades because the government didnt supply, is liable for the complications that may arise.