Hi Bodo-Lutz,
re:
> Hi Michael
> this pdf file for example
Yes, that PDF file contains a bitmap image like I was describing above.
If you open it in a PDF viewing program and zoom in to some of the lines, you will see a result like this:
Notice how when zooming into the lines, they get all blocky and jagged looking?
That's happening because the data contained in the PDF is a bitmap image, not drawing elements like lines and circles.
A bitmap image has data in the form of a whole lot of little colored squares. It may have the general appearance of lines when looking at a zoomed out view but it's not really line data. PDF content that uses vector graphics elements instead of bitmaps will have a sharp smooth looking appearance even when zoomed in.
So yes that PDF can't be loaded into MoI because it only contains bitmap image data inside of it and not vector drawing elements like lines.
If you use a PDF viewer program to extract the image into a PNG bitmap image file you could place it as a background image in MoI using the View > Image command, and then use that as a reference image to trace over.
But there is not any lines or curve geometry in the PDF file to be loaded as lines and curve objects in Moi.
- Michael
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