To export PDF/X-1a compliant files, you will first need to create a PDF/X-1a Output Style in QuarkXpress 7.0.
The procedure to create a new Output Style is required only once and will available for selection each time thereafter.
In the Edit menu, select Edit Output Styles...
In the Output Styles pallete, click on the New button and select PDF from the list that appears, as shown below.
Once you have selected the PDF option, the following Edit PDF Style pallete appears.
First, type in PDF/X-1a in the PDF Style field. Then select PDF/X-1a: 2001 for the Verification option, as shown below and click on the OK button.
Once you have clicked the OK button, you have now saved a new PDF/X-1a Output Style and are ready to export an approved PDF.Check The Page Size
When starting the creative, ensure that the page dimensions are correct.
Check The Colors Used
In the Edit menu, select Colors..
In the Colors pallete, ensure that the advertisement contains only CMYK colors.
If there are Spot colors in the creative that have not been converted to CMYK, you will see the "Spot color" in the notes when the color is selected.
To convert to CMYK, select the Spot colot and click on the Edit button.
Once you have clicked the Edit button, the following Edit Color pallete will appear.
To convert the to CMYK, uncheck the box next to Spot Color, as shown below, and click the OK button.
Once you have clicked the OK button, the Colors pallete appears again.
Export PDF/X-1a File
In the File menu, select Export followed by the Layout as PDF... option, as shown below.
Once you have selected Layout as PDF, the following Export as PDF window will appear.
Name your PDF file in the Save As field and for PDF Style, select the new PDF/X-1a Style, as shown below.
When you have finished, click the Save button to export your PDF.