I need to have an 'Enter' icon to show up in the bottom right of some textareas, to indicate that user could press enter to have his input processed. This is how it needs to look:

![enter image description here](https://i.stack.imgur.com/4GcjL.png)

How can this be done? It must work with multiple sizes of textareas, so I would prefer something that's flexible and not done via position:absolute