Millisecond Forums

Thank you very much for the fast answer!
I think will be able to fix the problem now :)

Ideally, you should not specify a fixed canvas size at all. If you want consistent results with respect to relative sizes and positions across varying screen resolutions, you should specify all sizes and positions in percentages (not fixed pixel values) and impose a specific /canvasaspectratio in the scripts' <defaults>.

1280 x 800 pixels is a 16:10 aspect ratio, while 1920 x 1080 pixesl corresponds to a 16:9 aspect ratio. I.e. if you want to preserve the original aspect ratio you worked with, you would specify

<defaults>
/ canvassize = (100%, 100%)
/ canvasaspectratio = (16,9)
</defaults>

and revise the various stimulus elements sizes accordingly / convert them to percentages, i.e.

<picture Bild1>
/items = Bild1
/ size = (800px,600px)
/position = (50,45)
/select =noreplace
</picture>

should become something like

<picture Bild1>
/items = Bild1
/ size = (42%,56%)
/position = (50,45)
/select =noreplace
</picture>