Curve Tool: Linking Curves

Some applications require synchronizing the curves from two or more axes. The Link Curves feature keeps track of updating all visible curves together. Turning on this feature causes the following changes to take place when editing a curve:

When a point is added to a curve, the following steps will be taken:

If the point being added is within five pixels in the time (or master position) direction from a point on another visible curve, then the point to be added will have its time (or master position) adjusted to match the existing point on the linked curve. This makes it easier to add synchronized points using the mouse.
If the point being added is not within five pixels in the time (or master position) direction from the active curve, then the point is added to the active curve, and a point is also added to curves of other visible axes that do not already have a point at that time or master position. The position used for these new points will either match the existing curve, or if it is off the end of the existing curve, will match the position of the closest point on that curve.

When a point is dragged on one curve, points on other visible curves that have the same time (or master position) value will also be adjusted time-wise. The positions will not be changed on the other curves.
When a point is deleted on one curve, points on other visible curves that have the same time (or master position) value will also be deleted.

To turn the Link Curves feature on or off:

On the Tools menu, click Options.
Click the General tab.
Under Editing Options, set or clear the Link Curves Together check box.
Click OK.