How do I select only all healthy/wounded units in a stack?

[Conqueror Worm]

I am playing on Diety Aggressive. The AI has huge unit stacks, and so too must I have. Does anyone know what key I need to press in order to seclect or deselect all healthy or wounded units only from a stack?

 

[Refar]

I think ALT+H was all wounded units... Might be something_else+H... Never used it myself it's one of those tooltips in the loading screen... (Maybe there is a way to access them directly to look up.)

 

[DaleForPericles]

What seems to work. Yes, I know this post is old, but this way is not posted.

<ctrl>-click on unit group to select and group the units
<ctrl>-H on a specific unit group to get just the unhealthy ones
tell them to heal (hot key or click on the heal icon, which I use)

The effect is that the remaining healthy units in the same group become selected.