Text Properties
That property allows specifying the visible text for a label field such as a Title, a Sub-Title, a Column name, a Comment etc.
Note: ClicknDECiDE Builder attributes automatically the default text "Text" to any new label field inserted inside a block report.
You can use the Format Tab in the Properties Dialog Box to see or modify it.
If the text you want to type is quite long, you can use the Text Editor.