# `GSFormatVersion.GSFormatVersion4`

*Case*

The source format introduced by Glyphs 4.

## Declaration

```swift
case version4
```

```objc
GSFormatVersion4
```

```python
GSFormatVersion4
```

## See Also

### Format Versions

- [`GSFormatVersion.GSFormatVersion1`](/Core/GlyphsCore/GSFormatVersion/GSFormatVersion1) — The source format used by Glyphs 1 and Glyphs 2.
- [`GSFormatVersion.GSFormatVersion3`](/Core/GlyphsCore/GSFormatVersion/GSFormatVersion3) — The source format introduced by Glyphs 3.
- [`GSFormatVersion.GSFormatVersionCurrent`](/Core/GlyphsCore/GSFormatVersion/GSFormatVersionCurrent) — The most recent source format supported by the framework.