Changing your password   
If you wish to change your password, click the key icon.  A new window like the one to the left will appear.  Enter your current ('old') password and then type your new password in the 'new password' box and then again in the 'Confirm New Password' box.  Click 'Submit'.
Changing your window size
If you wish to change your application window size, click the tools icon.  A new window like the one to the left will appear.  Choose your preferences and click submit.