Randomly picking on the last page of the http://pcf.gallery provides you an idea on some of the possibilities. The Microsoft Power Platform team provides a few PCF options out of the box, the community provides others, and you can also have your partner of choice create one for you. Pos...
Another thing I do is OnVisible of the Notes Gallery screen, I set the below formula. NowOnSelectof the download icon, I use the below formula. And the final step is thedownloadproperty of the PCF Control which I set to the below formula. All set and done, below is the final stuff ...