Hi,
Robcat is right on both counts, but maybe I can offer a little explanation that helped me get this. "Transition to Next Action" will give you a very basic transition, but you can also turn the "Blend" option on with your layered Action Objects (I assume that "stand with gun" is one Action, and "aim at target"is another) Then over a series of however many frames (say 6 if this is to be a fast-ish action, but you'll have to play the sequence and tweak, and that's assuming you're animating based on 30) you would set the blend ratio of the uppermost action in the timeline to ease in a linear way from 100% to 0% and the lower action in the timeline (probably the aiming one) to ease up from 0 to 100%. In some cases you can overlap the transitions, and it's nice and smooth. Generally, I have learned that "Blend" works best with Action objects (saved out as reusable .act files) and Add works best with Choreography actions, which are generally actions that you keyframe by hand in the Chor that don't tend to be cyclical because you want to introduce some variation. For example, maybe your character shoots at someone (Action Object, does this often as repeats, set to Blend) but at one point your character makes a disappointed/angry/rude gesture because he missed (Chor Action, set to Add), then he tears off after his target in a run (also an Action object if a long run, set to Blend). There's quite a lot in the AM manual about these topics as well.
You'll find "Add" and "Blend" in the properties window, same as "Transition to next action" The default is "Replace."
These topic threads might be helpful, they helped me when I was getting the hang of it.
http://www.hash.com/forums/index.php?showt...l=transitioning?
http://www3.telus.net/imagestreamstudio/tu...nblend_tut.html (The QT movie in the latter might not play, but the images are fine, or update your QT. I didn't need the movie.)
Although some of them involve Paths, transitions between actions don't need Paths, your character can be standing in one spot, or on a Path with the ease set to a certain point so they aren't moving.
And, if you really can't get a good blend between, you can create a short transitional Chor action that will make the other two actions look less abrupt, and may give some anticipation. Or, perhaps the ultimate cheat: jump cut to another camera angle (if appropriate for the sequence -- use sparingly, can create tension or confusion almost equally). I hope between this and "Transition to next action" you get the effect you want.
best of luck,
S.