Epson Equity II - Manual (Page 22)

You can tilt the angle of the keyboard by adjusting the legs on the bot-
tom. To adjust the legs, turn the keyboard over and lift each leg upward until
it locks into place, as shown in Figure 1-7. You can adjust the legs to two
different positions, or leave them flat.
Figure 1-7. Adjusting the keyboard legs
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User’s Guide