Update README.md

basics/DynamicFont/README.md

@@ -7,10 +7,8 @@ The way Apple keeps its fonts looking good (even when people resize their device
 <img src="https://github.com/jrasmusson/ios-starter-kit/blob/master/basics/DynamicFont/images/sizes.png" alt="drawing" width="800"/>
 
 
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 So long as you stick to these `UIFontTextStyle`s, your app will resize its fonts appropriatedly. The advantages here aren't just astectic. They can also serve as the design language you use with your designers. So when you say `Title1` everyone will know what you mean, and you won't have to hardcode font sizes any more.
 
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 ## Source
 
 ```swift
@@ -132,6 +130,12 @@ public static var traitUIOptimized: UIFontDescriptor.SymbolicTraits { get }
 public static var traitTightLeading: UIFontDescriptor.SymbolicTraits { get }
 public static var traitLooseLeading: UIFontDescriptor.SymbolicTraits { get }
  ```
+
+ ### Customer font
+
+ ```swift
+ tagline.font = UIFontMetrics.default.scaledFont(for: UIFont.systemFont(ofSize: 12, weight: .bold))
+ ```
 
 ### Links that help