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If you add any new slides from the New Slide drop down menu, they should all have the footer by default.Perform the Apply to All button again to get the footers to appear on all newly added slides.You will simply need to go to the top slide (any slide works), open the Insert menu tab and click onto Header & Footer. When you paste more slides in (or multiple slides all at once using destination theme).

You should now see the footer appear in the RED slides.Go back to the Slide Master tab in the ribbon menu and Close Master View.You should see that the Date and time and Footer options are ticked. In the ribbon menu, go to the Insert tab and click onto Header & Footer.Scroll up to the Master Slide above and click onto it.The boxes will be placed in the same position exactly like the other slides. Pick the slide above it, using Shift, Click onto the three footer boxes (date (left), website (middle), page number (right), copy and paste into the last slide in the slide master.The slide you have been copying across using this slide template but you didn't have the footer placeholders for it to activate. Go into your Slide Master and scroll all the way down to the last slide, you'll see that it doesn't have any footer boxes set up.Delete the orange slide (which will also delete the orange slide master).Using your attached file New Destination Document.pptx I have done the following steps:
If I understand the requirements, you want to see the RED footer activated when you copy the source slide using destination format. I initially thought you wanted to retain the original orange footer but have the objects formatted to destination. Not the most ideal way to do it, but unless I'm not understanding right, this would be how I'd do it? It will put the content per the destination format but retain the source file footer.
