Align spreads with different page sizes acrobat

[default1zn7l8u4ete5]

I have a spread with two pages that have a different page size. Now there is the same space at the top and the bottom, but I want the pages to align at the bottom so all of the space is at the top. How do I do that? 

I already tried making the page bigger an trimming at the top but acrobat still always aligns them centered....

[creative explorer]

@default1zn7l8u4ete5 It sounds like Acrobat is automatically centering the pages in the spread due to their different sizes. To align them at the bottom, you'll likely need to adjust the Page Boxes within Acrobat. Specifically, you'll want to modify the Crop Box or Bleed Box of the smaller page to match the height of the larger page, but starting from the bottom edge. This will essentially add transparent space to the top of the smaller page, making its effective printable area the same height as the larger page, thus allowing them to align at the bottom when viewed as a spread. You might need to experiment with the Crop Box or Bleed Box settings in Acrobat's Page Setup or Print Production tools to achieve the desired bottom alignment.