Description in printed bill

Hello,
How do I increase the width of description in printed bill.
I have attached a jpg.
I need to increase the size of the black box where it is written "This is a test"

Below is the code which i need to change. I guess I have to change the storage option part which I am unable to do.

[#Field: EI Desc]
Use : Name Field
Style : Small Italic
Storage : BasicUserDescription
Set as : If (($$ExplodeLevel = 0) AND ($$Line = 1) AND NOT ##SVAcctsInvoice) Then

$Description:StockItem:$StockItemName Else $$Value
Cells : @@ExcelItemColumn

 

Hi Sir,

Use this Below Code

​

[#Field : EI Desc]​

Width : 70% Page
Max : 5000​

 

Hello Mr. D Lokesh

Thank you so much. It worked.

I am looking for one more change in the invoice. I'll try to do it myself first. If required i'll ask n the forum.

By the way, MAX:5000 means 5000 characters?

Thanks once again.
Regards
Shahid