patch layer(An application layer that is paired above an application layer, and used only for hotfixes and service packs. The name of each patch layer ends with the letter "P", and one pair is named SYS and SYP)
correction area(An area that appears in the writing pad when you tap the recognized text that you want to correct. You can use it to rewrite an incorrectly recognized character or to replace a word with a suggested alternative)
