Dynamic COPY and PASTE with variables.
This changes the pasted text every time you paste. Usually, this is so that a number is incremented each time.
It supports an unlimited number of variables. The syntax for a new variable is: $$varname,0,1$$ $$ escapes. varname is the variable name, the initial value, and how much to increment each time you paste. To use an existing variable: $$varname$$
Here is an example: Hello$$alpha,0,1$$, World$$beta,9,3$$! $$alpha$$
The example's output: Hello0, World9! 0 Hello1, World12! 1 Hello2, World15! 2