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# convert(_:toFace:)

Returns a font whose traits are as similar as possible to those of the given font except for the typeface, which is changed to the given typeface.

```
func convert(_ fontObj: NSFont, toFace typeface: String) -> NSFont?
```

## Parameters

`fontObj`

The font whose traits are matched.

`typeface`

The new typeface; a fully specified family-face name, such as Helvetica-BoldOblique or Times-Roman.

## Return Value

A font with matching traits and the given typeface, or `aFont` if it can’t be converted.

## Discussion

This method attempts to match the weight and posture of `aFont` as closely as possible. Italic is mapped to Oblique, for example. Weights are mapped based on an approximate numeric scale of 0 to 15.

## See Also

[`-  convertFont:`](/documentation/AppKit/NSFontManager/convert(_:))

Converts the given font according to the object that initiated a font change, typically the Font panel or Font menu.


---

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