Offsets are differences between the calculated (initial) and the real position of an element in a pattern that happen when an element is set apart or changes position. The offset elements are highlighted during preview of the pattern.
Creo Elements/Direct Modeling allows you to reset pattern offsets and propagate offsets to the other elements in the pattern. For example, if an operation like move faces changes the depth of a pocket faceset feature in the pattern, an offset is automatically added to the feature.
The Follow operation allows you to propagate this offset to the other elements in the pattern.
Reset operation removes the offset from the selected elements and sets them back to the original pattern position.