Split large images into several areas in the preview file

[jbartlau (combit - Jochen Bartlau)]

Sounds to me like you’d be better off splitting the letter template itself into multiple areas, or using a PDF. Here’s an article covering the topic:

I Have a Small Background Image – Why Does the Print Process Use That Much Memory?

JPEG or PNG files are often used as a kind of letterhead replacement. In this case a scan of the desired background is inserted into the project to fill the entire page. Even if these background graphics are only a few MB in size, a large increase in memory is evident at the time of printing the project. The reason is that not all printer drivers can handle the JPEG and/or PNG format. In order to make the output usable on all printers afterwards, such files must therefore be temporarily convert…

Artificially splitting large images into smaller ones might lead to problems for printers or other export formats (hairlines between sections, no common selection, irritation for screen readers/accessibility features). I don’t think we’re prepared to tackle this.