You can reset the measured values of features to match their respective nominal values. This is probably most useful when using portable devices. Measured features before the alignment are shown in relation to the device at the measured locations in the Graphic Display window. If those locations are from a previous run, and the part has moved, then those features will be drawn in an unexpected location on the screen. Resetting those measured values to the nominals will redraw the features so they rest appropriately atop the CAD model.
To reset features' measured values to match the nominal values:
Click Operations | Features | Reset Measured Values to Nominals.
You can update all nominals by clicking the All menu item. To update just the currently selected nominal feature, click the Current menu item.