The Fonts & Colors preferences pane provides options having mostly to do with script formatting and text sizes.

Editor Colors

Background

The background color of the text area of script windows, and of text views of explorers (i.e., Source view and AEPrint view).

Insertion Point

The color of the flashing insertion point cursor in a script.

Selection

The color of the selected stretch of text in the text area of script windows, and of text views of explorers.

Tab Stops

The color of the vertical lines marking tab stops, if visible.

Insertion Line Highlight

The highlight color of the entire line containing the insertion point in a script. The line is highlighted as long as the selection does not include any end-of-line characters. The checkbox toggles this feature off completely.

Current Line Highlight

The highlight color of the entire line that’s about to be executed in debug mode. The checkbox toggles this feature off completely.

Error Line Highlight

The highlight color of the entire line marked as the location of an error. The checkbox toggles this feature off completely.

Multiple colors can be overlaid on one another (because a line might be highlighted for multiple reasons, including being selected); that’s why the highlight colors all have some transparency by default. Feel free to experiment, but if you accidentally make your scripts illegible, click the Factory Defaults button to revert them.

AppleScript Formatting:

The pretty-printing of compiled scripts is provided by AppleScript (as part of the decompilation process), not by Script Debugger. This part of the Fonts & Colors preference pane thus accesses AppleScript’s preferences.

You can select a single line and summon the Fonts or Colors dialog to change its setting; or, select multiple lines of the table and summon the Fonts or Colors dialog to change their font or color all at once.

Changes are not sent to AppleScript until you click the Apply button. When you do, any compiled scripts that are open now, as well as any compiled script files that you open or create in the future, will take on the formatting you have specified. To cancel (changing your mind without applying your changes), switch to another pane, or close the window.

Plain Text Formatting:

The font and color of plain text in explorers that is not formatted as decompiled AppleScript. For example, AEPrint view is just plain text, so this preference applies to it. Similarly, a string in Best view is plain text — but the same string in Source view is an AppleScript literal.

Font Sizes:

Outliners/Inspectors

The text size in outliners and various script window inspectors and panes such as the clippings pane.

Event Log

The text size in the event log.