The following article uses options that are available starting with the Enterprise edition and project type.
Go to the Dialog Editor page. Select a dialog containing a ScrollableText control form dialogs tree, such as your ReadMe Dialog or License Agreement Dialog.
Add a new PushButton control to your dialog.
In the Properties pane set the control text to &Print and enable the "Print Button" option from the "Print" category.
If your dialog has more than one ScrollableText controls, you can choose which control text shall be printed by selecting it in the "Control" field combo.