Manipulate: how to save the value of a controller variable

Questions
1

Dear all,

I am using Manipulate on a graph to define custom key points on the x-axis defined by a vertical gridline which I move using the Manipulate functionality. Once I have found these points, I am currently having to press the “+” button which reveals the value of the variable and then I have to copy and paste it somewhere into a new array. It would be much more convenient if I could create an additional button in the Manipulate which when clicked would add the current variable’s value to an array. Is there anyway to do this?

Thanks,
David

2

I’m not entirely sure this answers your question, but here is a very simple example:

values = {}
Manipulate[Column[{x, Button["Add to values", values = Append[values, x];]}], {x, 0, 5}]

Every time the button is hit, the current value of x is added to the list values.