I like that some tools also provide a copy button next to fields, it looks like two overlapping boxes (kind of like: ⎘). If I were building a tool that exposed

I like that some tools also provide a copy button next to fields, it looks like two overlapping boxes (kind of like: ⎘). If I were building a tool that exposed user copyable keys, I'd be sure to add these to my forms and fields. A brief contextual "copied!" modal that quickly fades away is a nice touch too.