The tiddler icon cascade is a cascade used to choose which icon should be used for a particular tiddler.

The core tiddler icon cascade can be found in $:/core/ui/TiddlerIcon

The default tiddler icon cascade consists of:

1. If the tiddler has an icon field, use the value as the title of the icon tiddler
2. If the tiddler $:/config/DefaultTiddlerIcon exists, use the value as the title of the icon tiddler

You can see the current settings for the tiddler icon cascade in $:/ControlPanel under the Info -> Advanced -> Cascades -> Tiddler Icon tab.

• How to create a custom tiddler icon rule