I am running Adobe Acrobat XI Pro. I have had my signature saved for months, and usually when I want to sign a document, I click on Fill & Sign Tools - Place Signature, and then I just drag and drop my signature into the document where I choose. I opened a fillable PDF yesterday with a signature blank, and when I tried to drag/drop my signature in my usual manner, it opened a "Sign Document" box, and made me click and drag the space where I wanted my signature to appear, and then had me click to "Sign" the document. My signature appeared much smaller than it usually does on the document, and I finally ended up printing and signing the document, then scanning it in and emailing it to the recipient.
Today, I tried to sign a document in my usual manner, and it now opens the same "Sign Document" box and will not let me just drag and drop my saved signature the way I have always done. And it's still making me draw a box for where I want my signature to appear, and the signature is much smaller. The document is a Word document that I created, saved as a PDF, so there are no fillable fields or other security or validation settings that have been changed. How can I go back to my easy signature method?? Please help!!
Sorry for the delayed response and inconvenience caused, please refer to the following KB docs which discusses the similar issue and scenario Cannot sign fillable form Link: https://forums.adobe.com/thread/2285546
You can also check for any pending updates of Acrobat from Help>Check for updates, reboot the machine after the installation of updates and see if this brings any difference.
Let us know how it goes.