Hi there, in Papers 2 there was an easy option to permanently hide the first page of a selected PDF. It won't actually delete the page from the PDF itself, just hide it from any view in Papers.
I found this to be a useful function to hide that distracting front page that are often added to publishes articles (often with expanded metadata). Common in pdfs downloaded from JSTOR, RG, Chicago journals, Royal Soc. etc.
It will be lovely to have this feature back in RedCube Papers. Thank you.