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# NSSymbolReplaceContentTransition

A type that replaces the layers of one symbol-based image with those of another.

```
@interface NSSymbolReplaceContentTransition : NSSymbolContentTransition
```

## Overview

A replace transition animates the change from one symbol image to another. You choose from one of the predefined scaling animations: Down-Up, Off-Up, and Up-Up.

- Down-Up: The initial symbol scales down as it’s removed, and the new symbol scales up as it’s added.
- Off-Up: The initial symbol is removed with no animation, and the new symbol scales up as it’s added.
- Up-Up: The initial symbol scales up as it’s removed, and the new symbol scales up as it’s added.

## Topics

### Accessing symbol effects

[`transition`](/documentation/Symbols/NSSymbolReplaceContentTransition/transition)

An effect that replaces the layers of one symbol-based image with those of another.

[`replaceDownUpTransition`](/documentation/Symbols/NSSymbolReplaceContentTransition/replaceDownUpTransition)

An effect that replaces a symbol by scaling it down, and scaling a different symbol up.

[`replaceOffUpTransition`](/documentation/Symbols/NSSymbolReplaceContentTransition/replaceOffUpTransition)

An effect that replaces a symbol by removing it, and scaling a different symbol up.

[`replaceUpUpTransition`](/documentation/Symbols/NSSymbolReplaceContentTransition/replaceUpUpTransition)

An effect that replaces a symbol by scaling it up, and scaling a different symbol up.

### Determining effect scope

[`transitionWithByLayer`](/documentation/Symbols/NSSymbolReplaceContentTransition/transitionWithByLayer)

An effect that replaces each layer separately.

[`transitionWithWholeSymbol`](/documentation/Symbols/NSSymbolReplaceContentTransition/transitionWithWholeSymbol)

An effect that replaces all layers simultaneously.


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