Chat Fusion User’s Guide 162Refining Horizontal and Vertical AdjustmentYou may need to fine-tune both horizontal and vertical adjustment tomeet the user’s needs. Have the user move his or her head left and rightand up and down to try to place the pointer in each corner of the screen.1. If the user has trouble reaching the right or left edges, increase thehorizontal adjustment value.2. If the user has trouble reaching the top or bottom edges increasethe vertical adjustment value.3. If a slight head movement to the left or right moves the user off theedges of the screen, decrease the horizontal adjustment value.4. If a slight head movement up or down moves the user off the topand bottom edges, decrease the vertical adjustment value.5. If the user has trouble positioning the pointer in the corners of thescreen, increase the horizontal adjustment and vertical adjustmentvalues.6. If the user makes large head movements and loses the pointer,decrease the horizontal adjustment and/or vertical adjustmentvalues.7. If the user makes small head movements, increase the horizontaladjustment and vertical adjustment values.
