How to update Windows Ink to support handwriting-to-text Microsoft is currently testing these new Windows Ink updates with a limited pool of Insiders in the Dev Channel.

This post helps to add a text box to PDF using a free software and an online tool. You can adjust the size of text box, text style, etc.

If you want to add a Text Box in Google Docs then you can use the Drawing option & Single cell table, & change font, border width, background color, etc.