Preview.app with .pdf: crop box view in slideshow revisted

Regarding the archived discussion found here:

https://discussions.apple.com/thread/2368904

The question was never really answered as to provide a working solution for Nicolas. Here is his original question:

When I preview a .pdf in the "crop box" mode and I start a slideshow, it shows me the "media box" version.

How can I see the the crop box in the slideshow?

I have had this same issue with certain PDFs in Preview. The simplest and quickest solution I propose is:

1) Open PDF in Preview

2) Find out the actual cropped page size via Tools > Show Inspector

3) Go to File > Print... and then to Paper Size: Manage Paper Sizes... and create a custom paper size for the cropped page size.

4) Finally, click on PDF V Save as PDF... and save a copy of the original PDF.

When you open the file copy in Preview and go to View > Slideshow it will now compose without the crop marks and bleeds.

If anyone still is having this issue, I hope this helps.