CR (for Enterprise) | BEx Query | How to show values of a BEx variable?

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Hello experts!

I am new in Crystal Report thats why I need some help. Maybe its solved fast, but I need more help.

I built a Query in SAP BEx Query Designer with some variables (for authorization) for example Business Unit. Now if I use my CR Report the variables comes up like a popup, thats okay.

My aim is: if I choose one or more values of the Business Unit or some other parameters/variables, then the value of the parameter should be shown on the report header.

If I put my parameter in the header of the CR Report, it shows the first value but not the other 2. How can I show all my selected values of the parameter? I can just use the report header and footer.

Any ideas?

best regards!

EDIT:

I solved it with "join(param,', ')" .

Now... how can I show the description of the value. It just shows the technical name/short description. ?