Maybe someone know it... If there any trick or key to just watch planned action?

It's been a real long time since I played this but I think one of the expansions added that feature.
And here we are again, like Ghost Recon, Ubisoft doesn't want us to have the expansions. I'm really getting to hate that company.
In my reply above I may be confusing Rainbow Six with Rogue Spear. If I am then I appologize. I remember using that feature a lot but I can't remember which game started it. But I still hate Ubi for denying us the expansions on old games that they probably get sell anywhere else.

You'd be referring to the Full Watch mode of Rainbow Six's expansion, Eagle Watch

Ah, thank you. Being old and forgetful is embarrassing :-)