How to know font sizes in a digital signed pdf ? Plug-in available to do so ?

Hello,

I work in a company where graphic workflow use signed .pdf in routine.

Our regulatory department needs to check the size of the fonts AFTER THEY ARE SIGNED.

Before signature, the "modification" tool can be use to select and check font sizes within the pdfs.

Once it is signed, we cannot access to this tool and can verify sizes of fonts.

Is there another way to check it in SIGNED pdfs ?

Is there another tool or a plug-in ?

Or a specific way to create our signature to have this function still available after ?

VERSIONS USED :

Creation of pdfs : Acrobat 10 & DC on macs

Review/font check : Acrobat reader and Pro XI on PC.

Thanks in advance,

S. JANDOT