By default, the graphical two-paned diff viewer displays the two files side by side with the differences highlighted.
Each time you change a setting in the Visualizer combo box, the diff command runs again with the new setting.
If you use the command-line diff engine, you can set diff command options (for example, diff -b) in the diff settings in the Options window.
Each time you change a setting in the Engine combo box, the diff command runs again with the new setting.
You can modify the Diff display properties in the Options window. To access the display properties, choose Tools > Options from the main menu, click Advanced Options in the Options window and expand IDE Configuration > Server and External Tool Settings > Diff and Merge Types.