Hi,

Before trying further tweaks, could we first clarify which /systemic/ constraints are active here, and which /local/ ones apply to the appendix block? In particular:

 *

   Is the document globally set to |doublesided=yes|?

 *

   Do the heads (e.g. |\setuphead[chapter]|) enforce |page=right|?

 *

   Are there any |openright|-style settings in the environment?

 *

   Does |\startappendices| implicitly alter page behaviour?

It seems likely that multiple constraints are being combined:

 *

   the |\setupsectionblock[appendix][page=…]|,

 *

   plus a head-level |page=right|,

 *

   possibly plus double-sided layout logic.

That might explain why |page=left| results in /two/ inserted pages: ConTeXt satisfies one constraint, then re-adjusts for another.

So the real question may be: which pagination rule has priority here?

Best//JP


Le 13/02/2026 à 23:23, Henning Hraban Ramm a écrit :
Hi, my book is nearly finished, but it has one page too much.
I could shorten one, but it doesn’t help, because the appendix insists to start on a right page (after an empty left page).

This is my setup:

\setupsectionblock[frontpart][page=no,number=no]
\setupsectionblock[bodypart][page=right,number=yes,setups=headeryes]
\setupsectionblock[appendix][page=no,number=yes,setups=headeryes]

"setups=headeryes" just changes the header texts; I also tried without.

How can I force my appendices to start on a left page? (No, page=left doesn’t help, it inserts another 2 pages.)

Hraban
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