Just hit enter so you get your blinking cursor. Then use the up/down arrows by themselves. You don't use shift. Shift seems to jump you a few at a time. So just the up/down arrows for scrolling commands. Also, you don't need shift key when moving your cursor left & right, if you use the shift key when do, it will start highlighting text and you can then type over a section of text instead of backspacing/deleting one character at a time.