Pine language becomes more and more flexible! Now you can define step size for each input:
study(title="Parabolic SAR", shorttitle="SAR", overlay=true) start = input(0.02, step=0.01) increment = input(0.02, step=0.01) maximum = input(0.2, step=0.1) out = sar(start, increment, maximum) plot(out, style=cross, color=blue)
You can read more about Pine Script Language in the Pine Script Tutorial and in the Pine Script Reference