These widgets are written by Fable.

First widget: This shows what fraction of the population ($y$ axis, log scale) you have to treat to multiply the total number of people above $k$ SDs by the multiplier, using an intervention with strength along the $x$ axis.

Second widget: A curve with weak intervention at $+k$ SDs shows, at position $x$, how much less you have to scale an intervention that adds $x+k$ SDs vs. an intervention that adds $k$ SDs, to multiply the number of people above the threshold SDs. (The multiplier apparently doesn't matter.) Notice that if you make two curves like:

• above +2 SDs, weak intervention +1
• above +3 SDs, weak intervention +2

then the curves are very close (though distinct), and if you do

• above +4 SDs, weak intervention +1
• above +5 SDs, weak intervention +2

then the curves are basically indistinguishable.

Third widget: This is similar to the previous widget. A curve with target $+s$ SDs above the strength of the weak intervention shows, at position $x$, how much less you have to scale an intervention that adds $+x$ more SDs vs. the weak intervention, to get the same multiplier. These curves are an approximation, following the observation from the previous widget. (Basically, this approximation is good when meeting the threshold was quite rare in the first place.)