Ksp reference Manual

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Automation
$CONTROL_PAR_AUTOMATION_NAME
Assigns an automation name to a UI control when used with 
set_control_par_str()
$CONTROL_PAR_LABEL
can be used to set the automation value string
When assigning automation names to XY pad cursors, use the 
set_control_par_str_arr() 
command with this param-
eter.
$CONTROL_PAR_ALLOW_AUTOMATION
Defines if an 
ui_control
can be automated (1) or not (0). By default automation is enabled for all automatable controls.
Can only be used in the init callback.
$CONTROL_PAR_AUTOMATION_ID
Assigns an automation ID to a UI control (range 0 to 511). Can only be used in the init callback.
Automation IDs can only be assigned to automatable controls (sliders, switches, and knobs)
When assigning automation IDs to XY pad cursors, use the 
set_control_par_arr() 
command with this parameter.