Using Adobe Sign, you would like to send a document for two colleagues to approve. However, when you attempt to add the document to the files to be sent for signature, that file type is grayed out. What file type is not eligible for Adobe Sign?

Here is the answer to this question: Using Adobe Sign, you would like to send a document for two colleagues to approve. However, when you attempt to add the document to the files to be sent for signature, that file type is grayed out. What file type is not eligible for Adobe Sign?

GIF
JPEG
BMP
PSD