decorations on mecabricks are added by a dedicated group of users, and only official ones can be used.
What you can is to use you own decorations in Blender for renders : you can then use an official decorated part in your model and then swap the official decoration for your own before rendering.

I will try to ask my question more correctly.
I found needed parts with decorations (torso, tiles) in the workshop.
But my minifigures have not the prints on its torso. I can to delete clean torso from all minifigures, and then add torso with prints from library. But this method will take a long time. The minifigures has various poses. Can I add prints from mecabricks library to a colored clean torso in the workshop? Just like a change color of part. May be in some settings of torso part?

Hello,
I think I understand your question. LDD importer doesn't import decorations.
There is no easy way to replace them. There are a few tricks you can use though. You can select the plain torso and add the decorated version you want from the part library. It will be located at the same place as the plain one, then delete it. Same for the arms, snap the decorated arms to the plain imported ones and then delete after.

Thanks for help, guys!