After all the preparation time drawing your objects, assigning fill colors, and setting up bones, you move on to animating them. This is where things actually start to move around.
Animating in Moho is based on the concept of keyframes. A keyframe is a point in time where you position some object (either a point, a bone, or an entire layer). A keyframe tells Moho exactly where that object should be and when. Keyframes are set up at "important" moments in time - typically where an object begins moving, stops moving, or changes direction. Between keyframes, Moho automatically calculates how to move an object so that it gets from one keyframe to the next in the amount of time allowed between the keyframes.
To create a keyframe, just set the current time to whenever you want the keyframe to occur, then move the object to the desired position. Controlling the current time and working with keyframes after they've been created is discussed in the Timeline Window chapter.
You can animate several types of motion in a Moho project, and they can each be used alone or in combination. The first type is point motion. Point motion very basic - it just involves moving individual points around in time. Point motion is good for small distortions to an object where you want something to look soft and flexible (turning up the corners of a mouth into a smile, bulging out a belly, etc.). You can move a shape in any way you want with point animation, but it might require manipulating a lot of points - in many cases bone animation can simplify the job.
Bone animation involves setting up a skeleton system for an object and then moving the skeleton around. By carefully constructing a skeleton, you can easily move a character around like a puppet.
Layer animation is for very simple, large-scale motion. When you move a layer, everything in it moves together. This doesn't give you a lot of flexibility as far as what you can animate this way, but it's a good way to get certain effects. If you want an entire group of objects to pan side to side or zoom in or out, then layer animation is the tool to use.
The keyframes you define are visible in the Timeline, starting at frame 1. Frame "0" is a special frame in a Moho project - the original placement of all your objects is stored at frame 0. If you want to modify an object's original shape or position, or add new objects, this should be done at frame 0. Whatever you do to an object in later frames can never affect an object's original shape and position, so even if you think you really screwed something up, you can always delete some keyframes and get back your original drawings.
The Tutorials section has a useful hands-on overview of how to animate in Moho, using each type of motion (point, bone, and layer). Once you've mastered Moho's animation tools, animating is a simple job of repeatedly using the tools you already know, keyframe by keyframe.