Personal favorite goes to Picard asking for all available power, even from life support if necessary, and Worf presses one or two buttons and says "Done." Seems like life support power diversion should at least be a three button push operation...
Could that be the signal for someone downstairs to start doing so? Or perhaps a pre-programmed command, similar to how you might have a person in your speed dial. One is for one level of rerouting power (everything but life support), the other is for the next level (including life support). Or "Re-route ALL power" > "Are you sure?" Maybe the button reads fingerprints/DNA/other biometrics and confirms that this person is indeed allowed to issue such commands. But with all the command codes, maybe not.