Looking for list of icons and descriptions within process designer

Hi all – I’m a total newbie here, so please bear with me (and I hope this isn’t a silly question).

In the Process Library, I’ve noticed that the listed processes sometimes display icons indicating how the process is started. I went through the documentation but couldn’t find a single place that lists all those icons with their descriptions (like a quick reference guide).

Does anyone know where I can find such a list?

Thanks!