You can mask your passwords or other Identity Types with asterisks, thereby hiding them from the results view by clicking the "Mask Passwords" button on the Main ribbon. This button will also be renamed automatically to "Mask Matches" when you choose to mask more than just passwords. To configure which Identity Types will be masked, see the Mask Identity Matches help page.
There are several reasons you might want to do this, but you should note it only affects the results view and not the Preview Pane. If you choose to Save your results, the actual passwords will be written to the file, not the asterisks.
Note: If you are highlighted on a result with a masked Identity Match then the actual information, not the asterisks, will be displayed in the Preview Pane highlighted in yellow.