Click on the 'Manage Views' button which is located on the HOME menu ribbon.
The Manage Views dialog box will now appear showing your list of views.
Select the View you want to edit and click the Edit button.
The Edit View dialog will now appear.
Click on the IMAGE OPTIONS tab to access the Image Format selector as shown below.
You have 4 file types to choose from, select the type required then click OK.
PNG
BMP
JPG - Selecting this format will enable the JPEG quality Slider.
GIF