Font size 'Auto' not working

[Christian Karcher]

Hi,
I am creating a certificate with a Name field for which I am setting the font size to 'Auto'

When filling the form in Acrobat DC, it works as inteded...
Short name:

Long name: 

However, once saved as a pdf, the font does not autosize any more. It starts with a small font size that doesnt change and looks like this:

I've gon through alls ettings and can't find an explanation or solution.

Many thanks in advance!

[try67]

What do you mean by "once saved as a PDF"? If you edit it in Acrobat it's already a PDF...

[Christian Karcher]

Sorry, I wasn't that clear. What I meant is once I open that pdf in an application other than Acrobat DC (eg in Mac Preview or th Acrobat Reader, it displays the font size incorrectly.

[try67 · Accepted solution]

Unfortunately, Preview is a very buggy application and is known to corrupt PDF forms just by opening them, so this is not surprising. There's nothing you can do about it, except for complain to Apple and ask them to fix it, and instruct your users not to open the file using this application.
They should stick with Adobe Reader (or Acrobat, if they have it) for best results.

[Christian Karcher]

In Acrobat Reader it doesn't work either unfortunately...

[try67]

Is this the file you already opened in Preview? If so, it's been corrupted. Transfer a fresh copy of it and try it again. If it works in Acrobat it should also work in Reader.

[Christian Karcher]

Yes, turns out that as soon as it's opened with Preview, the function is corrupted. Very annoying.

[JR Boulay]

Apple Preview support PDF formats from 1.0 (released in 1991) to 1.4 (released in 1999), so that it is more than obsolete.

As its name suggests Apple Preview is a preview software.
It allows you to preview PDF, PSD, DOCX, XLSX, etc. files more or less faithfully, but you don't expect it to have the same functionality as Photoshop, Excel, Word, etc.

It's the same for the PDF format, Preview does not have a hundredth of the features provided by Acrobat.