Sometime, GPS displays too many words in 18-cells braille display but I can not read all at once. I would like to have a key to freeze it while I am reading. For the example: I press the Space with X for the information on the intersection, then I may press the spacebar hold down to freeze the display. I also can press the Advance Key for next display until I am done with it, then I release the spacebar. Otherwise, it is already include, please tell me how. Thank you, Leslie--