- Open layer details for the layer you wish to add a text field to.
- Click on the Edit layer icon.
- The Layer editor dialog opens.
- Go to the Fields tab.
- Click on the Add new field located at the bottom of the existing fields list.
- The content editor will open, make sure you set the Type attribute to Long text.
- Set other fields as applicable.
- Save by clicking OK.
Now your layer contains a new text field.