Prompt syntax () and []

You can use () and [] to adjust strength of the text.

() - emphasize a tag to make it more prominent in your generation

[] - de-emphasize a tag, meaning to lessen how much it affects the prompt, but not removing it from the generation altogether.

[keyword] decrease the strength by a factor of 0.9 and is the same as (keyword:0.9).

You can use multiple of them, just like in Algebra. The effect is multiplicative.

(keyword) = 1.1
 ((keyword)) = 1.21
 (((keyword))) = 1.33

() is 1.1 , (( )) is 1.1x1.1 = 1.21 , ((( ))) =1.1x1.1x.1.1 =1.33

Similarly, the effects of using multiple [] are

[keyword] = 0.9
 [[keyword]] = 0.81 
[[[keyword]]] = 0.73