When saving your script you need to change the format of your script into a PDF. To do this you need to click on the bar at the bottom of your screen and it will say type set/ save as a PDF file. When you click on this celtx automatically formats the scrit into a PDF file allowing you to save your script. To save the script you need to click on file which is at the top left of the screen and then you need to click on save project. When you have done this you need to go to my computer and then click on the link which has your name in it then you can make a folder saying script and save it in there.