How saving affects parameter values
In MainStage preferences, you can set whether changes to mapped parameters are kept when you change patches or are reset to their saved value. By default, when you select a patch, the mapped parameters in the previously selected patch return to their saved value (as defined in the Screen Control Inspector). When you save the concert, changes to mapped parameters for the currently selected patch are saved (but mapped parameters for other patches retain their saved value).
If you set the On Patch Change preference to “Keep current value,” when you select a patch, the mapped parameters in the previously selected patch retain their current value. When you save the concert, the changes are saved (and the previous saved values are lost).
If, however, you close the concert without saving, mapped parameters return to their previously saved values when you reopen the concert.
If you decide not to keep your latest changes, you can revert a concert to its previously saved state.
Revert a concert to its last saved state
Choose File > Revert to Saved.
All the changes you have made since the last time you saved the concert are lost when you revert the concert to its last saved state.
Set the default behavior for saved values
Choose MainStage > Preferences > General.
In the Parameter Values section of the General preferences pane, choose the default behavior from the On Patch Change pop-up menu.
To preserve changes to parameter values when you change patches, choose “Keep current value.”
To return parameters to their last-saved value when you change patches, choose “Revert to saved value.”
You can also set the behavior for saving parameter values for screen controls in individual patches. For information, see Set parameter change behavior for screen controls.