Hi denis,

Based on your screenshot, it looks like this is something to do with the browser that you're using. You can click the maximize button on the upper-right corner beside the close icon to view the whole invoice or quote.

Otherwise, you can also use another browser like Google Chrome. 

I have included this link in case you have other questions about QuickBooks Online (QBO): Manage Customers And Income.

Post a comment below if you have any other concerns. I'd be right here to help.