Your comment about the half-day vs 30 seconds made me think that perhaps I should give it a go. (I had to Google how to use VBA code in a PPT file first!) It worked, but now I have two more questions.

1. How can I position the label at the bottom centre of the slide? I played around with the position numbers in the code but couldn't see how to move it to the bottom.

2. In the code I presume that the "AlternativeText" is the file name. Is there a way to get the macro to pick up the Image Description from the EXIF data instead of the file name?

Thanks again.