## [Processing] Menu

### Basic Data Manipulation

#### History

##### Processing History

You can confirm the history of basic data manipulation (Waveform filter, Baseline subtraction and Background subtraction) operations which have been performed, and delete operations.

1. While a spectrum/chromatogram is displayed, select [Processing] in the menu bar and then select [Basic Data Manipulation] > [History] from the drop down menu.

   The Processing History dialog appears.

2. Select the operation to delete and click [Delete].

   - Click [Delete All] to delete all the operations.