How to fix Description Collapsing like this?

Hello, I’m getting a good preview of my invoice but after generating the invoice it seems different and description changing to 2 lines see the picture, how can I fix this?

Manager is not a what-you-see-is-what-you-get program. The screen display adapts to the size of your window, within limits. Completed documents adapt to the size of your paper setting. The first display obviously would not fit on a page.