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The most professional PDF software is PDF editor apps. When you need to replace an image, change the text in a PDF, add new form fields, or edit anything else in a PDF, they're the apps you need. They can also create new PDF documents and forms from scratch
You’ve received a PDF file that you need to fill out, sign, and then return to the sender. In some cases, the sender may have created an electronic PDF form in which you can easily add text into the appropriate fields. Sometimes the file is just a static PDF with no ability to electronically edit the form fields
So if you have the Apple pencil, you cannot use it to sign the document, but to can use it to create a stored signature that is inserted into the document. I would much rather sign on the document itself as the whole point is to sign and not insert the same exact stored copy of my signature into every document. Sort of dumb.Also when inserting a field to type in text, it doesn't seem to see the context so it just puts it on the point you touched rather than attempts to align it