The dialog appears when you click the Options button on the side bar and then select Share Parameter from the option list. It lists all the parameters used in the current dashboard and helps you to share parameters among library components. See the dialog.
All Parameters
Lists all the parameters used in the library components in the current dashboard. Cascading parameters in the same group are placed within one row.
OK
Closes this dialog and applies the setting.
Cancel
Cancels the setting and closes this dialog.
Apply
Applies the setting without exiting the dialog.
Displays the help document about this feature.
Ignores the setting and closes this dialog.