The braille settings dialog box can be invoked by going to the preferences menu and then to the braille settings option.
The first option you will come upon in the braille settings dialog is a combo box that says "braille display". You will be presented with three options. Move between these options with the arrow keys. No braille means that you are not using braille. Freedom Scientific is for Freedom Scientific Focus/Pacmate displays. Note that this option only appears if you have the braille driver from Freedom Scientific installed, see Official Freedom Scientific braille drivers page for more info on how to obtain and install the drivers. Handy Tech is for the Handy Tech displays. Note that this option will only exist if you have installed the Handy Tech Universal Driver. BRLTTY allows you to use a wide list of braille displays. Please install the BRLTTY Windows installer in order to get support for these displays.
The next option you will come to in this dialog is the braille table combo box. In this combo box, you will find braille tables for different languages. You can move from braille table to braille table in the list by using the arrow keys.
This option allows the word that is under the cursor to be displayed in non-contracted computer braille.
This option is a numerical field that allows you to change the blink rate of the cursor in milliseconds.
This option is a numerical field that controls how long system messages are displayed on the braille display.
When pressing NVDA+Control+T, you can control what is being displayed on the braille display. The two options are focus and review. Focus displays what is being accessed via the arrow keys, the tab key, in short, focus navigation. Review allows you to review what is on the screen, I.E object navigation. You can cycle between these options by pressing control+NVDA+T.