Copy link to clipboard
In the attribute panel, loop option, frame selection suggestion increase, up and down buttons. In general, many simple settings do not need to enter values to improve operating efficiency.
You may want to look into this: http://flash-powertools.com/next-frame-in-symbol-or-next-keyframe/
There are a lot more tools there as well which are extremely popular among animators: http://flash-powertools.com/category/commands/