Hold M to see the whole front
In the February Ashes of the Singularity II demo, holding M zooms out to Strategic View. Use it when a fight pulls your attention away from other armies or when you need to choose where to expand. Then return to a closer view to act on the situation you've identified.
Give each zoom level a job
Use Strategic View to compare widely separated positions. Look at where your main army is committed, whether another force can respond elsewhere, and how far it would need to travel. Before redirecting an army, pick the part of the front that matters most.
Use the closer view for selecting the right force and placing an order near the actual target or terrain. Switching back in before you click gives you a chance to distinguish a safe approach from the direct line into a fight.
Combine the view with army selection
The official demo shortcut table also lists a single tap of an army number to select the army and a double tap to select it and move the camera there. A practical sequence is to hold M, spot the fight that needs attention, then double-tap the relevant army number. Check that you're on the right army before issuing its next order.
FAQ
Do I tap M or hold it?
Hold M in the documented demo. The published binding specifically lists a hold action.
Can Strategic View take me straight to a selected army?
The shortcut table lists a separate army-camera action. Double-tap that army's number to select it and move the camera there.
What if my key bindings differ?
Use the binding listed for your build or custom control settings. The source describes the February demo.