Created attachment 165882 [details]
Result

SITUATION
I wanted to print a portrait A4 document with two pages as two pages per sheet so the whole document would fit on one one-sided sheet of paper.

SUMMARY
I selected page layout -> pages per sheet -> 2 (2x1).
The preview then shows two landscaped pages on top of each other on one portrait sheet. This confused me, so I selected landscape but then the print came out as two portrait pages above each other on a portrait sheet.
The original setting, (attached) however, gave me the desired result.

STEPS TO REPRODUCE
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OBSERVED RESULT
Print preview shows two landscape pages on one portrait page

EXPECTED RESULT
Preview of one landscape page, with the two portrait pages in it (see screenshot expected result)

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 
KDE Frameworks Version: 
Qt Version: 

ADDITIONAL INFORMATION