When I export my InDesign document to an Adobe PDF (print), I get lines in the corners of the PDF (pic below). I don't see them in the InDesign document. How can I remove them from the PDF?
I'm using Windows 10 Pro.
untick "Crop Marks" when you export PDF from indesign
These are crop marks, switch them off in the pdf preset that you are using to export the pdf
can you show us screenshots of your .pdf export settings?
Marks and bleeds:
ok, that looks righ. now lets look at your document set up and the layout screenshots?