I have a 80 odd slide presentation that gets built with new content each week; a fair bit of that content is duplicated throughout the presentation and always in exactly the same places. This content is text, pictures and background images.

Is there any way to link text boxes etc so that anything I put in that text box on slide x automatically populates into the text box on slide y? Same for background images (when I change the background image on slide x, the background image for slide y also changes)?