If you're seeing your screens import in pink, chances are that your PDF is using CMYK format. If in this format, you'll need to re-export the PDF in RGB format and then upload it again to replace the existing version.
If you're seeing your screens import in pink, chances are that your PDF is using CMYK format. If in this format, you'll need to re-export the PDF in RGB format and then upload it again to replace the existing version.