No need to show the line 'Press ENTER to continue...'

[yurivict]

With the gnuplot backend the show() function shows the window with the plot, and also displays the message Press ENTER to continue... which expects ENTER to be pressed.

There is no need to require the user to make 2 clicks to move on. Just closing the window should be sufficient.

[alandefreitas]

Just closing the window should be sufficient

That's not possible with Gnuplot because pipes are unidirectional.