You will find the following buttons at the bottom of most driver dialogs.
OK—saves all the new settings and closes the driver or dialog. These new settings remain in effect until you change them.
Cancel—closes the dialog and returns all settings to the values that were in place before you opened the dialog. Any changes you have made are lost.
Apply—saves all the changes you have made without closing the driver.
Help—displays help information about all features on the current tab. For help on a single item, click on the question mark (?) at the upper right hand corner of the dialog and then click the item.
Defaults—resets the current tab and all its settings to the system default values. The changes apply ONLY to the current tab; all other tabs remain unchanged.
Default All—resets options to default system values. Some features and tabs may not have specific default settings and will not be affected by this button.
Restore Defaults—resets the current tab and all its settings to the system default values. The changes apply ONLY to the current tab; all other tabs remain unchanged.