Many views in MacVector display amino acid translations above or below DNA sequences. Typically, these are from CDS features, but can also be the 3/6 frame translation of a sequence. You can display the amino acids as either the single-letter code, or as the three-letter code. You can toggle the setting using the MacVector | Preferences -> Text View pane.
![](https://macvector.com/blog/wp-content/uploads/2024/05/AACode-1024x650.png)
Changes are reflected in many different windows. Here are a few examples.
![](https://macvector.com/blog/wp-content/uploads/2024/05/AACode-1-1024x265.png)
![](https://macvector.com/blog/wp-content/uploads/2024/05/AACode-2.png)
![](https://macvector.com/blog/wp-content/uploads/2024/05/AACode-3-1024x301.png)