I have a problem with signing a PDF off mine, i can open the tool Fill in & Sign, but the next thing that happens is that i can`t open the button of Sign... It stays a little invisible and there is just nothing happening... maybe there is a very simple solution for it, can someone help?
Sorry for the delay in response.
If you have an interactive form then sign button will not be active. This feature effective form flat/scanned forms.
For more information, you may visit this help page: Fill and sign PDF forms using Adobe Acrobat Fill & Sign
Let us know if that helps.