How do I update a PDF Version from 1.4 to 1.7?

[jeahoon2818448944dy]

I have already read the document linked below.

https://community.adobe.com/t5/acrobat-discussions/how-do-i-update-a-pdf-from-version-1-3-to-1-4/td-...

According to Dov Isaacs, "By definition, a PDF 1.3 file complies with the PDF 1.4 specification except being labelled as a PDF 1.4 file."

I wonder if it is applicable to the 1.4 - 1.7 case as well.

[Bernd Alheit]

Yes.

[jeahoon2818448944dy]

Thank you!

[Test Screen Name]

It's carefully designed that way, so a PDF file right back to the very first version of Acrobat (PDF 1.0) can still be read by all PDF viewers. 

[jeahoon2818448944dy · Accepted solution]

Thank you!

[nsartor]

My bank wanted info in pdf > 1.4. Workaround was to open file in Acrobat Reader, add a comment and then save.  Re-open, delete comment and then save again.  Now works.