We apologize that you are having issues in finding these features. We have recently moved all these features into a better location for you to access. Follow these steps to find these features:
You can find these features here:
1. Navigate to the canvas
2. Click the green arrow beside the zoom controls
3. You will see an extension with 4 features on it
(From Left to Right: Annotation On/Off, Protractor, Page view settings with night mode and continuous mode, Grid lines)