The PDF export dialog exports out the size of the document you created in InDesign.
You could resize the document in InDesign before your export. But the easiest way to crop would be to use the Crop tool in Acrobat after you export the file.
A screen shot might help...
The page is the page. If you do not desire to have any part of a page displaying in the PDF, you need to extend a background or other design element into the bleed area, or at least to the edges of the page.
If these will be for print, extend these items into the bleed area. You may need to define a bleed area in the publication setup.
If these PDFs are informational or the intent is on-screen viewing only, all you need to do is to extend the design elements to the page edges.
Thanks for the help, Steve.
I did read that on the Adobe site somewhere.
But how do I set up documents initially or export documents with settings to ensure that I do not have white margins?
Here are some screen shots of what I am working with. I just figured out how to change my settings from picas to inches.
Thank you, Mike.
How do I extend the design elements to the page ends?
If I were to set up print bleed settings, what would I need to do?
Are there further resources on this issue that you know of?
Using your last screen shot as a reference, the left-hand red object would need to extend to the top page edge, the left page edge, and probably the bottom page edge (but I cannot actually see the bottom of the page in that screen shot).
If you are going to have these printed, the second to last screen shot has bleed settings set to zero. As you are in the US presumably, I would set the bleed amount to 0.125". Then extend the red object I mentioned to the bleed guides that will show up.
Same with any of the other elements that you desire to extend to the page edge or the bleed guides.
Here is a better screen shot, I think.
I made set the bleeds to 0.125 as you recommended. I still don't quite understand...
I noticed in your original screen shot that you had set the margin guides to 3p0 (which is half an inch). I'm curious why, if you don't want white margins, you didn't set this to 0? You don't have to, of course, margin guides are just that, guides and you can ignore them if you wish, but if you want your content extending to the edges, I don't see that setting margins is particularly useful.
If this will be printed and cut to final page size, extend the red elements to the bleed guides like so:
But if this PDF will be used for on-screen viewing, downloading for someone to read on-screen, that sort of thing, bleed is not needed. so extend the red elements to the edges of the page, or to the bleed area and do not include bleed when you make the PDF.
If the file will export to both, screen and print, extend it always to the bleed guide. It causes no damage, if any frame extends the page border.
I would not ignore margin guides as I would neither ignore any other guide. If you want later to use layout adjustment you have to align everything to these guides, otherwise you can't use it. So I would recommend to be very restrictive in this aspect.