Create a Stamp - PNG issues

[BuntenGroupLauren]

I am trying to create a stamp. I have the png file I would like to use to create the stamp. I get all the way through the creation process until I have to find the png file. The dropdown menu to tell Adobe to find files that are only png is not showing anything other than pdf. I can't select my png because it is only finding pdf files. How can I get Adobe to show me other options in the dropdown box so I can use the png file for my stamp?

[Test Screen Name]

Please tell us three things

1. The web address of the instructions you are trying to follow

2. Whether you have Acrobat Reader (free) or Acrobat (paid)

3. The exact version of your app (e.g. 11.3.22 or 2016.123.43434)

[Bernd Alheit]

In Acrobat Reader DC you can use a Clipboard image as stamp.