How to change material type of user defined cross section

[yiviw97057]

I made a special cross section in the section definition, I cannot remember what material I set it to be, I believe it was B25 Concrete:

Can I change the material type of this cross section without having to redo it? I want it to be concrete:

[Krzysztof_Wasik · Accepted solution]

Hi @yiviw97057 

Use material definition drop down list