To change graphical format click on the Convert to item at the right side of the Batch Converting Dialog, click on drop-down list of supported graphical formats and choose a graphical type that you need.
On selecting graphical type the child node on the left pane will show current type and it's advanced settings (optional). Only the Icon and Jpeg formats have advanced settings. Advanced settings can be changed if a child node with graphical format on the left pane is selected.
Icon options:
16 colors and 256 colors.
Jpeg options:
color depth (8 bits or 24 bits), color type (RGB or Grayscale), Quality (in percentage) and Progressive option. Refer to the Jpeg options topic for more information.
If user converts only one image file and changes image graphical format then resulting file extension is automatically changed.