The following special keys, when used while also using your pointer, modify how those gestures work. (These are in addition to systemwide macOS modifiers, such as holding Shift to make a vertical scroll wheel scroll horizontally.)

When starting to drag an event:

- Hold Option to make a copy of that event and drag the copy instead (see Duplicate and Drag)

While dragging an event:

- Hold Shift to allow the event to be placed anywhere, even if it’s a span event overlapping another span event (see Event Overlaps)
- Hold Shift+Option to force the event to create a new, empty row wherever you drag it, ensuring it remains on a row by itself
- Hold Command to prevent snapping to nearby time interval dividers (weeks, months, etc.), so you can always drag it to any allowed date

In other cases:

- Hold the space bar to pan; your pointer turns into a hand, and you can click and drag to move the timeline around
- Hold Command and turn a vertical scroll wheel to scale your timeline up and down; this is equivalent to using the two-finger pinch/stretch gesture on a trackpad