Is it possible to have the crop marks where you want when making a PDF?
So if I have an Indesign document 84x55 with a 3mm bleed but I want a PDF from that document to crop at 85x55 (adding .5mm to the left and right of the PDF), the crop marks are offset by 3mm but I want the left and right crop to be .5mm out into the bleed and not at the document edge.
Resizing the Indesign file is ruled out for the moment.
In the marks and bleeds section of the export dialog deselect crop marks and select bleed marks, then set the bleed amount manually to the offsets you want.
add a slug to the file, and put crops manuallly inthe slug area, then include the slug in the export.
The automatic crop marks will always indicate the trim size of the document as defined in Document Setup, so the simple answer is no. You will need to draw custom crop marks in the slug area. You can set the slug area my clicking More Options in Document Setup.
This is a highly unusual request. The purpose of crop marks is to indicate the one and only trim area for the page. Why do you want crop marks that don’t match the document size?