Reducing PDF sizes!

[s15]

Hi All!

Does anyone have any advice on reducing PDF sizes to below 32MB please? I have a 36 page document and saving it as PDF for digitial - small, 72DPI, but the smallest it will go to is 90MB! I have no cancelled my Adobe so Im fully committed to Affinity products but I am panicking right now as this document needs to be online by the end of today :-/

The only way I could get it below 32MB, was to "flatten" it, but it didnt include half my images, and since this is an e-magazine, the images are pretty important :p 

Any and all advice would be massively appreciated! I have tried Adobe Bridge but it will only open the cover of the big PDF I made and save that one page! 

[Old Bruce]

Some grasping at straws questions...

Is your Affinity document's DPI set to 72? What if any effects layers do you have applied and are they confined to images/objects (have them nested ininstead of overtop of the layer) or are they applied to the entire layer?? Have you tried rasterizing the image layers in the Document before exporting?

[lacerto]

(...)

[s15]

Thanks everyone! 

I had used as many images as you would probably expect in a magazine with cars, some pages 2 or 3, some pages as many as 8. Some of the adverts sent were quite big so I wonder if it's them. I honestly didn't have time to investigate much further as I was on a tight schedule, just a little frustrated as the previous person who did the magazine was gloating at how much better indesign was and how Adobe will reduce them easily... I eventually discovered ilovepdf and managed to shrink it that way. 

Thanks Lagarto for your analysis above, very interesting and good for thought!!