How to shrink the size of the cover page (the 1st page) of a pdf file?
The pdf file is here: https://zzzhhh.egnyte.com/dl/E2fDor5OZq
As you can see, the cover page (the 1st page) is far larger than all other pages. So I want to shrink it to the same size as others, specifically, to 8.263 in x 11.695 in. I read the article here which uses Preflight to scale a page. But maybe because I am working on Windows 10, the "Scale pages to specified size" fixup does not exist (please disregard the one I created in the screeshot below):

So, I decided to create one according to this article. However, I don't know what I should set in the "Adjustment" option. What is worse, since I only need to shrink the first page, I don't want to apply the fixup to all pages. But I did not find "First page" or "Specified page(s)" that I expect in the dropdown menu of "Apply to".

So, can you please tell me what the "Adjustment" option I should choose for shrinking, and how to specify "Apply to" to apply the fixup to the cover page only? In addition, it's so awkward to use Preflight to perform such a simple task. Is there any other function in Acrabat DC Pro I can use to do it in an easy way? The answer from Sophia Baloch in this thread seems to work (Crop Pages) , but I got a ridiculous error "Page size may not be reduced". Please help me with this simple task of shrinking the cover page. Thank you.
