how do i make a booklet in Write?

I 'm trying to make a 12 page booklet in Writer. I want to print it on letter-size paper in landscape mode so that the resulting booklet is 8.5" by 5.5". Do I:
a) start with a letter-size blank document and put my text in two columns, (starting on the right column of the first page) or
b) start with 8.5 x 5.5 blank documents and try to figure how to print two pages at a time on 8.5 x 11" paper in landscape mode?
Thanks for any help.

Do b), then print as booklet (it is a printer option). Also can export your booklet to PDF, and use third party software to print the booklet.

Creating a booklet is a matter of printing: LibreOffice Help - Printing a Brochure

Printing a booklet using print settings will reduce the size. Make things you don’t want reduced 1.4 times larger. For example if you want to end up with 12 point font then write in 16 or 17 point font.

Thanks for the excellent answers. Just what I need…

@EarnestAl, I just tested to print a 10 cm × 10 cm shape, and (to my surprise) it was not reduced. In previous versions (don’t remember which one) there was a little reduction, notorious when printing 2 Pages per sheet with Draw a border around each page; that’s why my comment to export to PDF (what I use to do).

Your 1.4 times larger seem to me that you printed an A5 page size brochure on an A5 paper size. The ratio between A5 paper size height and width is 1.4142…

Yup. That what default booklet setting does; it takes, for example, two portrait A4 pages and places them on a landscape A4 page side-by-side

Start with a 5.5″ × 8.5″ document, then print as Brochure on a Letter size paper.

Tested with LibreOffice (x64); OS: Windows 10.0.

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Check the mark (Answer markCorrect answer mark) to the left of the answer that solves your question (it may take a little while until it turns green).

I just see the Paper size values in my screenshot. Where do they come from?

EDIT: Just restored my user profile without success. I can’t see a bug report related to this issue.

Lay out your document on Letter size page and then print as Brochure to get side-by-side portrait on Landscape Letter size page