If you're asking about whether you need a digital script in order to do line notes, the short answer is no, unless you want it. There are many ways to do line notes. I tend to take them in my own script by hand, then type them out later in Excel, filtering by each actor before I hand them out. If you have a digital script, it's great for the copy/paste option on bigger lines, but sometimes more headache to find, copy, paste. Others are big fans of PDF programs to highlight right in the PDF and send to actors. Others handwrite their line notes.
Having a digital version of the script is handy for many reasons, including updating your call script when you need to add in more cues than the original margins like, or other various reasons. If you've got a PDF available that looks the same as the printed one (doublecheck all page numbering, and really every line to be sure), sometimes there's not a great reason to retype the script as well. Do what works for YOU, and what you have time and energy to do, if it's useful.
Erin
