Using the ENTER key with VNC
 

How do you trigger the virtual keyboard when in VNC?
I usually use the thumb keyboard, without having problems while, i. e., navigating through firefox on my linuxbox etc., triggered by the central d-pad key.

but yesterday I needed to launch a script into a terminal launched on the remote computer: I couldn't find a way to press the ENTER... if I give it after the script name, then press the arrow down to collapse the thumbboard, VNC disconnects.
But I think there is no other way to send the ENTER to the remote computer while using the thumb keyboard.

I'd like to use the "regular" one...

Any advice?

Thanks, Omar