At the CommandCenter™ Main Menu select Hitch icon.
Press raise rate softkey (A).

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CommandCenter Main Menu → Hitch

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A - Hitch Raise Rate Softkey
B - Hitch Position Value
C - Hitch Response Indicator
D - Position Indicator
E - Upper Set Limit
F - Commanded Depth Indicator
G - Stored Depth Indicator
H - Touch Screen Increase Value (If Equipped)
I - Touch Screen Decrease Value (If Equipped)