at position

Specifies the frame to invoke a signal.

cancel

Removes signals from the workspace. An individual signal is specified by using the  uservalue  flag. If the  uservalue  flag is not specified by using  cancel , the device cancels all signals. The  cancel  flag is incompatible with the  at ,  every , and  return position  flags.

every interval

Specifies the period of the signals. The interval value is specified in the current time format.

If used with  at  position, signals are placed throughout the workspace with one signal mark placed at position.

Without the  at  flag, signals are placed throughout the workspace with one signal at the current position.

If this flag is omitted, only the position indicated by the  at  flag is marked.

If the interval value is less than the minimum frequency supported by a device, it will use its minimum value.

return position

Indicates the device should send the position value instead of the  uservalue  identifier in the signaling message. The  uservalue  identifier can still be used to cancel or to redefine the signal marks.

uservalue id

Specifies an identifier that is reported back with the signaling message. This identifier acts as an identifier that can be used with other signal commands to reference this signal setting. If omitted, the default value is zero.