Thanks for the detailed explanation.
GWD doesn't have the concept of removing frames, and it doesn't have a way of adjusting the total animation duration per layer. (You can do so in Code View)
Currently, when you select a span between 2 keyframes by double-clicking, then move, it maintains the duration of the span, so in this way, it might be a bit tedious but you can adjust the length of the animation layers.
- Double-click one of the animation span, which should be highlighted
- Holding down the shift key, then double-click another span in another layer
- Still holding down the shift key, double-click another span in another layer
- Move all together simultaneously
Hope this will help a little in terms of workaround, but thanks for suggesting a better way of adjusting timeline duration, removing frames...etc.
Thanks,
Mariko (GWD team)