# Uses of Interface
org.eclipse.jface.text.ITextViewerExtension3

Packages that use ITextViewerExtension3
Package
Description
org.eclipse.jface.text
Provides a framework for creating and manipulating text documents.
org.eclipse.jface.text.source.projection
This package provides the UI part for projection documents of which the most important part is the projection viewer.

## Uses of ITextViewerExtension3 in org.eclipse.jface.text

Subinterfaces of ITextViewerExtension3 in org.eclipse.jface.text
Modifier and Type
Interface
Description
`interface`
`ITextViewerExtension5`
Extension interface for `ITextViewer`.

## Uses of ITextViewerExtension3 in org.eclipse.jface.text.source.projection

Classes in org.eclipse.jface.text.source.projection that implement ITextViewerExtension3
Modifier and Type
Class
Description
`class`
`ProjectionViewer`
A projection source viewer is a source viewer which supports multiple visible regions which can dynamically be changed.