Is there a way to add a clickable hyperlink to the details of a custom python geoprocessing tool in ArcGIS Pro? I have tried using html just to see if it would work as seen below. I would like the end user to have the option to open the output pdf file from the results window.
I doubt it. Details, results and message boxes are probably all just text capable. I have done something similar by using Tkinter to create a hyperlink button. Here is a link to the sample I used.
You could also create a Task and have it create a popup with your html code.
Over 5 years later and I also need this.