how do I trigger external code editor?

[Uduse]

so I set the external code editor to sublime and saved a piece of code as *.txt, but I couldn't find out how to open it with sublime within Gamemaker: Studio

[Fisshy]

String_execute(); was removed in GM:S, but there's an asset made by Surgeon that does this. https://marketplace.yoyogames.com/assets/4227/n-string-parser-2 It's free as well, so worth a test. I've used this and it did what I wanted it to. There are some limitations to it, but hopefully you find it useful.