There are numerous ways you can select frames of an animation and move them around on a timeline. There are also many ways to modify your animation so it plays exactly the way you want it to when you publish your files.
Tween layers can contain tween spans, static frames, and blank keyframes. You can use the static and blank frames to draw on the frame, paste graphics, import a bitmap to the selected frame, and so on. These spans and frames can be moved within the same layer, or to most other layers. A tween layer cannot contain IK spans or classic tweens.
Tween spans cannot contain an ActionScript either on the frame or attached to a tweened object. However, a frame outside a tween span on a tween layer can contain an ActionScript. Ensure to put all your code on its own layer called actions (typically the topmost layer on the main Timeline).
Use the following context menu options in the tween layers to manipulate tweens:
You can copy the tweened properties from one tween span to another. The tweened properties are applied to the new target object, but the location of the target object is not changed. You can apply a tween from one area of the Stage to an object in another area without repositioning the new target object.
To copy a motion tween to the Actions panel or use it in another project as ActionScript®, use the Copy Motion as ActionScript 3.0 command.
You can copy the properties from a selected frame to another frame on the same tween span or a different tween span. The property values are added only to the selected frame when the properties are pasted. 2D position properties cannot be pasted onto a 3D tween.
These instructions assume that Span-Based Selection is turned on in the preferences (Edit >Preferences).