I help run a land/site development company and Irecently purchased a P4 to take aerials of my job sites.  We have a lot of out-of-town investors that enjoy seeing aerials.  The attached pic is from an aerial photo company we used in the
past.  I like how they have the thin white information bar on the bottom of their photos, but I can't seem how to do it
my P4 pics.  Can anyone help?

You can do this with iMovie i think...

You can do this with iMovie i think...

Very basic Photoshop.
You paste your photo onto a larger blank canvas and paste the bottom bar onto the white area ta the bottom.

You can even use PowerPoint if you have it.  

Should be able to do it in LightRoom as well. Just never tried anything like that. You really should have  post production software like that to edit your photos with. Make them look their best for your clients.