How to enable login window accessibility options in macOS 10.15 Catalina

To enable accessibility features for the login window

1. Select the Apple icon  in the top left corner of the screen.
2. Select System Preferences from the menu.
   
3. In the System Preferences window, select Users & Groups.
   
4. On the Users & Groups screen, select Login Options at the bottom of the left column. Note: You may need to unlock the system before you can change any of the options. To do so, select the padlock icon in the bottom left corner of the window and enter your password when prompted.
   
5. Once unlocked, select the Accessibility Options button.
   
6. Tick the checkboxes for any of the accessibility items you would like to use on the login window, then select Apply.
   
7. When you are finished, click the Close (red) button in the top left corner of the System Preferences window.

Note: If this does not work it could be because someone else manages your computer settings (an IT department or administrator). If this is the case, you will need to contact them to access these settings or for further help.