You can use the Redaction tool to mark areas you want to remove, and when you apply the redactions those areas will be white-out.
Be aware that this is not reversible, so you might want to save copies of your files before starting.
by redaction tool do u mean touchup object tools in adobe Prof. or is it something else to edit and remove??
No. By Redaction tool I mean the Redaction tool: View - Toolbars -
I've tried the Redaction tool. It paints black across the area which is quite discomforting. Can I change it to white?
Also, I'd like to keep the upper and lower portions of a pdf page. Is there a way I can mark and delete a portion of one page?
Also, once I've trimmed the pages, I have two small ones. Is there any way I can paste these two pages together inside Acrobat?
Thanks (hugely) for your help!
You can't really delete a portion of a PDF and have the rest close the space. You try using the object touchup tool to select an item and them move it. That is likely the best way to close the page up as you mention. You could then resize the page with the cropping tool, but the latter will not delete anything, only change how it is viewed. Remember to use the Save As when you finish. The save will keep the old stuff too. Bill
It paints black across the area which is quite discomforting. Can I change it to white?
Yes. Go to Redaction Properties and change the "Redacted Area Fill Color" setting.