In the PDF templates there should be an option for the Header where you can specify the width of the box that holds the address. We have sometimes addresses that are long and it breaks the line and puts them in the next line. if you could specify the width on the box at the template level we could make this space bigger.

Visually looking at the template the column that holds the addresses does not extend to all the available space anyway. if no option can be added to specify the width, at least Zoho could increase the width for this area where more space is needed.