Is there a way to ensure DPI of container is 300dpi while running a script from a windows client?
It is straight forward on an iPad.
The rendering component of a container field is based on the operating system's defined object that handles whatever file extension the file carries.
I don't know of any way you can specify DPI quality on any platform, but you may want to try turning off auto-scaling in the container preferences under the inspector and storage of thumbnails to see if that improves things on windows.
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