How I can increase the output width in SP01 t.code to see all columns data

Hai,

I am executing Z report in back ground mode , finally the output can see in SP01 t.code, in this output I am getting only max 10 columns out of 20 columns of the report. How I can increase the output width in SP01 t.code to see all columns data .

Thank u in advance.

Ramesh