Say I have a microflow with a String parameter. I could easily add a value to the parameter on the button and have it always send that string value to the Microflow when executing it. This would be extremely handy in some situations and would prevent us having to create an entire new entity and change how we handle the data just to get a helper value from the frontend.
Happened to see that this is already planned as of 2021, sometime this quarter?: https://forum.mendix.com/link/ideas/100