Guides

To create a curve trajectory for the motion tweening you need to implement a Guide
Guide consists of two layers. The first layer has a type Guide and includes a trajectory line.
The second layer placed below the guide has type Guided and includes the symbol instance, which will move on the stage
It's important to snap the symbol to the start and the end of the path for the first and last keyframes of motion tweening respectively
to change rotation of the symbol according to the curve use Orient-to-Path frame property