To convert several images to another graphical file type user should select images to be converted from the Thumbnails View. Selection can be made by mouse similar to a file selection in the Windows® explorer. Also, user can select images by holding down Shift key while pressing arrow up or arrow down keyboard keys.
To run mass conversion of the selected images you can select the Images menu item from the Top Menu, then the Batch convert selected images to... command. It is possible also to use the Operations... button at the Main Toolbar. This toolbar button will bring up the file operations menu. It is the same as thumbnails pop-up menu (see the screenshot). You can see the Batch Convert Dialog window after choosing the Batch convert selected images to... command.