Thanks @Eowyn, I've created a second Master .pptx file which is identical to my basic Master file, except that animations are removed (attached). Now I have two problems.
1) I can't figure out how to insert this second template into my file: I would have thought that "Insert slide master" would give me the option to insert a master slide, but it doesn't.
2) If I succeed in 1), it's not obvious to me how to switch to a second Master for an individual slide.

Would you mind showing me how to do that, using the attachment from my previous post and the current attachment?

Thanks very much for all your help

Attached Files

TemplateNOAnimation.pptx (29.7 KB, 7 views)