# `GSDrawEnvironment.master`

*Instance Property*

A context master for looking up additional details.

## Declaration

```swift
var master: GSFontMaster? { get set }
```

```objc
@property (nonatomic, strong) GSFontMaster * master;
```

```python
master() -> GSFontMaster
setMaster_(master: GSFontMaster)
```

## Discussion

`nil` when no single master context exists.

Setting the layer also sets this property.