After you have made a text block (SmartPart) you can edit this on a later time. You can add, remove and edit text in the text block and add variables.
To edit a text block you can:
1. Select the SmartPart in the Smart Parts-panel
2. Click on the button for the properties (four dashes) and choose Edit (pencil). Or click on the pencil icon directly to the right of the name of the Smart Part.
The Smartpart will now be opened and you can edit it to your wishes. When you are done, you click on Save below in the Smart Part-panel (Disc).