This is most likely an issue with firefox, but i noticed that when i create a file with z serie of images, the pdf shows correct in my local gnome document viewer (42.3) but when I vew the same file in firefox, for some unknow reasom the images are upside down. When I download the pdf, then view it with the local document viewer, the images are correct. When I drag the pdf into firefox, the turn upside down again. Is it related to the orientation option in the \externalfigure command that is not recognized by firefox? this is the code I use to place the images on the page: 8<--- \def\zzz#1{ \startTEXpage \externalfigure[2024/12/small/#1.JPG][width=\textwidth,orientation=180] \blank[10mm] \startcombination[3*1] {\externalfigure[2024/12/thumbs/#1a.JPG][width=0.316\textwidth,orientation=90]}{} {\externalfigure[2024/12/thumbs/#1b.JPG][width=0.316\textwidth,orientation=90]}{} {\externalfigure[2024/12/thumbs/#1c.JPG][width=0.316\textwidth,orientation=90]}{} \stopcombination \setcounter[userpage][\pagenumber+1] \stopTEXpage } \starttext \zzz{IMG_8616} \zzz{IMG_8617} ... \stoptext --->8