Unhide Fields of DataSource

Hello Experts,

I am working on this datasource 0MATL_GROUP_TEXT and 0material_group object. I want to display description of the Material Group.

0MATL_GROUP_TEXT has only 3 fields displayed(key1, langu, txtsh) but the ExtractStuct : ROTEXTSTR1 on which this is based shows Medium and long description too. How to make these fields appear in the Datasource as they are there in the ExtractStructure but not shown in the standard Datasource but are required for reporting.

Kindly help.

Thanks.