Although I can copy and paste in minecraft, how can I do it better? I saw a few people packing this on items.
I searched for it, but in vain. Perhaps you can help me.
Then you just need to make a right click, and you have already copied the. Z.b on a mountain
I think what you mean is WorldEdit, that's a mod you need to download. On Youtube there are a lot of tutorials about it:-)
That's admin commands. Can't tell you exactly what the command exactly means but it's best to read the minecraft admin commands
Since the question is a bit inaccurate I unfortunately do not know if you mean Vanilla or plugins. So I'll just give you an answer for both:
Vanilla:
Right click on a stick or something similar is a bit complicated. Three different variants including tutorials can be found here: https://technik-de.gamepedia.com/Mausklick-Sensor_(Befehle)
To use different sticks for different structures give them a name and check it.
To insert a structure as soon as the click has been successfully determined
clone x1 y1 z1 x2 y2 z2 ~~~
plugins:
The plugin CraftBook allows Commands, like the just named / clone, to be linked to items so that they are executed by right-clicking on the item.