I have much better dialogue engines now and I'm not updating this. Check the others out:
For GMS1.4: https://marketplace.yoyogames.com/assets/6069/text-box-maker-pro
And for GMS2: https://marketplace.yoyogames.com/assets/6657/dialogue-engine-text-boxes
This dialog maker helps to do dialogue for your games. It's very easy to use, but you can still modify it to your own style.
Includes:
Script: dialog(charactername,text,colour,textcolour,font);
Examples
Features:
Easy to use.
Flexible.
It works with views
End User Licence Agreement (EULA).