Google translate (slightly different from Microsoft's):
I am struggling while looking at the text. If I used the filter brush to enlarge and edit the details, it would go off the screen. I was able to move the screen up and down with "up, down", but I don't know how to move left and right. Please tell me.
In general, when using the adjustment brush, the arrow keys do not move the image within the window. To move the image, you can hold down the space bar to temporarily get the hand icon and click-drag with the mouse.