How to Change Time measure Display Format?

I have a crosstab displaying time measures in "hh:mm:ss" format in Design Studio (1.6).  Data source is BW Bex query using Time Key Figure.

Crosstab example:

       Duration          Qty    

A     00:59:04            5

B     00:45:45          26

C     00:31:26          10

D     01:07:00          30

E     00:58:34          25

...

...

However my requirement is to display the time with Hours and Minutes only (hh:mm format and no seconds).

       Duration     Qty    

A     00:59            5

B     00:45          26

C     00:31          10

D     01:07          30

E     00:58          25

I could not find a place to change the display format of a Time Measure in Design Studio.

Anyone knows how this can be configured, or any other way to display only the hh:mn in a crosstab?

Regards,

Lawrence