Change Script Editor settings on Mac
Script Editor uses fonts and colours in the text to indicate different language components and hierarchy.
Use the Formatting pane of Script Editor preferences to change the font, colour and typeface of scripts in Script Editor and in the Xcode development environment.
In the Script Editor app on your Mac, choose Script Editor > Preferences, then click Formatting.
Click the Language pop-up menu, then choose a scripting language.
To change the font of a category item, double-click the font name in the Font column, then select the collection, family, style and size in the Fonts window.
To change the colour of a font category item, double-click a colour swatch in the Colour column, then select the colour you want.
If scripts are open in Script Editor when you change the settings, the new formatting appears after the scripts are recompiled.