There are many helpful javascript source code examples on how to create a button like this :

but I can't find any documentation on how to create it in Architect.

The closest I could find is this doc :

I have a grid and I need to add a delete button, to remove a row. I can find the js code for the handler easily online, but what are the steps to create a button in Architect?

So far I clicked on MyGridPanel > Columns + > Action Column

and it created MyActionColumn but how do I specify a delete button with a trash can? thank you