Motorola VC5090 Product Reference Manual page 47

Loosen Locking Knobs
Figure 2-20
Squeeze the quick release tabs.
2.
Squeeze Quick Release Tabs
Figure 2-21
Move the keyboard to the desired position.
3.
Adjust Keyboard
Figure 2-22
NOTE Ensure that the positioning pins lock into the positioning holes in both brackets.
Release the quick release tabs.
4.
Installation 2 - 19