If you unchecked the option to Show button toolbar or turned on the Lock feature, the button to access Settings will no longer be displayed. You can use the keyboard shortcuts instead:

  • Ctrl-1 or F1 to display Settings
  • Ctrl-3 or F3 to display Camera Settings
  • If you have the Lock turned on, press ctrl + L to turn off the Lock and the toolbar will display

Note for Mac Users: On some Mac keyboards, you need to press the fn key to use any of the function keys. So you need to press fn + F1 to open Settings. Or you can change theSystem Preferences to use the keyboard function keys.