BUILT-IN WOLFRAM LANGUAGE SYMBOL
is an option to functions such as CreateDialog that specifies whether the dialog that is created should be modal to the Wolfram System front end.
- With the default setting Modal->False, other windows can be used even when the dialog is open.
- With Modal->True, no other Wolfram System windows can be used until the dialog has been closed. If there is no mechanism for closing the dialog, the Wolfram System will therefore effectively freeze.
Create a modal dialog that blocks operations in other open notebooks: