This is what the command line looks like:
It's almost always visible on the right screen. If you tap this then you open the Command Line view. It could look like
this:
Here you can use the onscreen keyboard to type in the commands and you can see the command history and the
response from the console. You can also use an external keyboard in the command line.
When the command line have the focus, then you can use the Up and Down keys to select previously used
commands - then you can execute the command by pressing the Please key. You can also use the up and down
arrows on an external keyboard.
The command history is also a view you can have visible on one of the internal screens or on the external screen.
Related links
Commands section
Command Line view
Command History view