First - ensure that you are using the Sign & Edit format.



Then - use this tool to add custom text anywhere on a document.


If Fill Out Form is not available, you must use the Overlay Text tool to enter text.



Select the Overlay Text button below the format options, then click on the document. 


The 'Overlay Text' Editor appears and you can proceed to enter text into the blue box.  You can change the font type, size, color, and style as needed.



Adjust placement of the text by clicking and dragging from anywhere within the Text Box.


To revise any Text Box on the document, click on anywhere within the chosen Text Box. Make the necessary changes as needed.


Please note that all text created through Text Boxes will become temporarily invisible once (and if) you switch over to the Fill Out Form mode.