Hello:
I create corel files in corel 2018 and submit them as pdfs to a wide format print shop. they cannot edit them, which sometimes is necessary. They have illustrator but not corel. I do not have illustrator. Any help with this is appreciated. Thanks Nicsz.
PDF files from CorelDRAW are designed for output not for editing.
They may be editable depending on what they're trying to edit them with and the content of the PDF. Complex files (fountain fills, complex objects and transparency) most likely not.