Browse and insert link to document in text web-part
When you are using the text web-part and want to link some text to a document it would be very convenient if you were able to browse the document library on that site collection and select the file instead of having to enter the URL to the document.
Janice M Q S commented
I am surprised that more people are not complaining about this - we link to documents inside of text web parts quite often, and it is so time consuming to have to manually grab the document link and paste it in.
Adrian Goneau commented
This was how it worked in classic pages but it does not work in modern pages. It seems like a basic expectation.