After you create a text layer, you can edit the text and apply layer commands to it. You can insert new text, change existing text, and delete text in text layers. If any styles are applied to a text layer, all text inherits the attributes of those styles.
You can also change the orientation (either horizontal or vertical) of a text layer. When a text layer is vertical, the type lines flow from top to bottom. When a text layer is horizontal, the type lines flow from left to right.