I'm trying to convert @SteveJG's code to my own app, but couldn't find the highlighted block in the image anywhere in the Maths drawer. Can anyone help?
Taifun
There is no 'Make a list' on the highlighted block. I didn't understand your answer. I did read the discussion.
Dear @Mike_B,
when you say "make a list" do you intend to have a vertical set of operands ? If yes, let me say in a different way what @Taifun has already suggested by directing you to a previous discussion on the matter.
There is the possibility to put the operands of mathematical, boolean, etc operations (blocks) in a vertical ladder by right clicking on the operator (in your case the minus sign), and then select "External inputs" as below:
After having selected the "External Inputs" the operator changes like the following:
Probably is this what you need ?