How to get the 'hand' cursor on an ALV drill down report?

I have a drill down on PO # going to trans ME23N that is working great.

But I have noticed on my other drill downs (E.G for billing doc VF03) that when the report is displayed the drill down field value is a) underlined and b) has a 'Hand' appear when you place the cursor over the billing document field.

This does not happen on my PO # - it is not highlighted with an underscore, nor do you get the small hand - but it does work when you double click the field.

The field I am using on the ALV report is RSEG-EBELN. This is not a KEY field in the table - perhaps that is why it does not have the underscore and the 'hand'.

Thanks!

Scott