ETC Cobalt Family v7.0.0 - Manual (Page 109)

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Entering Texts
Almost every item in a Play can be labeled with a text.
The texts are entered from a keyboard, and there is a special TEXT key that can be used to quickly
edit the text of a Sequence Step, or a Preset/Group in a Master.
Numbers and decimal point can be entered from the numerical keypad of the console(s).
IMPORTANT NOTE
If you have an external keyboard with a NUM LOCK key connected you
have to activate NUM LOCK for the numerical keypad in Cobalt to work.
This is because the numerical keypad on the external keyboard and Cobalt's
keypad are linked.