# `GSFormatVersion.GSFormatVersion1`

*Case*

The source format used by Glyphs 1 and Glyphs 2.

## Declaration

```swift
case version1
```

```objc
GSFormatVersion1
```

```python
GSFormatVersion1
```

## See Also

### Format Versions

- [`GSFormatVersion.GSFormatVersion3`](/Core/GlyphsCore/GSFormatVersion/GSFormatVersion3) — The source format introduced by Glyphs 3.
- [`GSFormatVersion.GSFormatVersion4`](/Core/GlyphsCore/GSFormatVersion/GSFormatVersion4) — The source format introduced by Glyphs 4.
- [`GSFormatVersion.GSFormatVersionCurrent`](/Core/GlyphsCore/GSFormatVersion/GSFormatVersionCurrent) — The most recent source format supported by the framework.