I need a Clarification in SAP PS "CN21"

Dear Friends,

Good Morning.

I have one clarification in SAP PS SAP Transaction Code CN21 to create Network for Materials. In this I need to create more than 100 Line Items ,

As off now we will do only 26 Line Items in a single shot.  How can I enter bulk Line Items in single shot?  

Please if anybody knows help me out with Screenshots .

Thanks a lot in advance.

Best Regards,

Kamal.S