Group expressions in rows to allow expand/collaps function

[#1]

Hello,

Is it possible to group expressions and then be able to expand collaps them in a pivot table (like you can do with dimensions)

So, in below picture I have an expression for each row. I would like to be able to group Quant var dir mat --> stock-taking, cost as they sum up to mat and procurem var and then be able to expand/collaps with +/- symbol.

Is there an easy way to do this?

[#2]

got it to work following this example

Thank you very much to both of you. Very helpful!!!

Button to Show/Hide a Calculated Dimension