If you ever wanted to just run parts of your script and check the output without manipulating your code, read on. The output of your whole script or your snippets will be shown in the "preview window" ([help preview-window]). In my case I used Ruby and mapped the commands to F7. I just select the stuff I want to run and press F7. The output is shown in a new window! The next time I press F7 the window will be closed and replaced.