Reading order is not printer order
A reader sees pages 1, 2, 3 and onward. A folded booklet places its first and last reading pages together on the outside sheet. Printing in ordinary page order cannot produce that result.
Check a small signature first
Use the generated eight-page example. Fold the two sheets, place the inner sheet inside the outer sheet and check every printed number. A reversed back indicates a duplex setting or feed problem.
Separate signatures
The tool treats each selected group as an independent signature. Keep the groups in report order when assembling a sewn or glued text block.
Fold a numbered proof before the full run
An eight-page left-bound booklet uses two physical sheets. The outer sheet's front places page 8 on the left and page 1 on the right; its reverse places 2 and 7. The inner sheet uses 6 and 3 on the front, then 4 and 5 on the back. That apparently unusual order becomes sequential when the sheets are nested and folded.
Generate the numbered sample, download the imposed PDF and inspect the accompanying sheet-order table. Print only a small proof, fold it and turn through the pages as a reader would. This confirms orientation and ordering with your actual printer. Looking at a flat spread on screen is not a substitute for checking the physical folded result.
Select the binding direction intentionally. A right-bound booklet changes the left and right placement of pages, which matters for the reading direction of your document. It does not translate text or mirror page artwork. Keep the binding choice consistent when checking the output table, print dialogue and folded proof.
The imposed output already contains paired pages on landscape sheets. Avoid applying a second booklet or multiple-pages-per-sheet mode in your PDF viewer, because that rearranges an arrangement the workbench has already made. Print the output as ordinary duplex pages, using the flip orientation established by your proof, before scaling up to the entire document.