Yes Dom is entirely correct of course. Any drill command has three parts – 1. Warning, 2. Dressing and 3. Executive.
Watch this way and I will give you a complete demonstration of the movement:
1. Warning – Who you wish the order to apply to – your squad, or the whole parade, or your wing? Just the Band, or the Guard and Band, or the entire Parade? Serves to wake every one up and let people know who it applies to:
'Squaad'or 'Paraaade' 'Division', 'Band', 'Guard',
'officers on Parade carrying swords' etc
2. Dressing – who to take guide from – Left, Centre or Right. Ie do you match your speed to the bloke on the left or the right or the guy in the centre. Optional for parties acting individually.
3. The executive – What it is you are to do, delivered in a sharp tone to enhance speed and performance:
'Shun!' 'Quick March' 'About Turn' 'Draw Swords' etc.
So a complete drill order will start on a High, then issue the dressing, if issued, on a low, and finish on a short high for the exectutive:
'SQUAD!'
'by the left'
'QUICK MARCH!'
'OFFICERS CARRYING SWORDS'
.'DRAW SWORDS'
Of course if there are multiple parties involved it gets more complex:
'BAND!'
.'by the centre'
'GUARD'
'by the left'
.'CORTEGE 'n ESCORT'
'by the centre'
"SLOW MARCH!"