I've been trying to figure out if this is possible.  So far, it doesn't seem to be.

I have one animation where I want to add about 20 frames at the beginning-a little "anticipation" action-and another where I want to delete the first 29 frames.  Poser doesn't seem to allow you to add or delete frames except at the end of an animation.  Can anyone tell me how to do this?

Thanks.

In the animation palette, draw a selection box around the existing keyframes.  You may then drag them across the timeline, or delete the selected frames altogether.

One can also copy/paste blocks of keyframes via this method.

A related questioncameup recently (http://www.renderosity.com/mod/forumpro/showthread.php?message_id=2947205&ebot_calc_page#message_2947205)

My current conclusions (with some help from the answers I got)

• As Little_Dragon said you can select keyframes and copy/paste etc. However I dont think you can select frames in between keyframes and do anything with them (eg cant copy cant delete etc)

• When you copy a keyframe and it includes a clothing item which was in a cloth simulations ,
  the shpe of the cloth is not copied over. I was thinking the reason for that is that the cloths shape is not controled by parameters like the pose of a figure. I ment to test this by including a morph in  the animation and trying to copy such a keyframe, however I didnt get around to it yet.

-Stricktly speaking you cant delete or add frames anywhere but at the end. You can work around  it by copying the relevant keyframes forward or backwards.

I only do annimation for cloth and hair, but was very surprised I cant find better annimation
editing tools

Of course, my negative conclusions may be partialy or completely wrong being that I dont have that much experience.  I'll be delighted to be proven wrong and shown there are easy-peasy  ways to do what I said cant be done.
Anyone from e-frontier know & would like to coment?