There are many, many quirks to copy and paste in drawings that can be very frustrating. I'll try to list the ones I can think of:
- You can't paste if you currently have anything selected (including the thing you just copied). To paste, you must click a blank area to ensure nothing is selected. This can be difficult because often clicking "blank" areas actually results in clicking a View.
- You can't paste if you just clicked outside of the sheet area. This makes ensuring nothing is selected per number 1 even more difficult.
- Some types of objects can't be copied at all (such as Balloons, Dimensions, and View Labels). If you have any of these objects in your selection and hit Ctrl+C, NOTHING will get copied, even objects in your selection can be copied.
- Most types of objects can't be copied with other types of objects. An example is Views and general Text notes. You can copy as many views as you want, OR you can copy as many Text notes as you want -- but if you try and copy both of them together, they just won't copy. In my experience, you can pretty much only ever copy one type of object at once. A very frustrating limitation.
- Some objects can't be copied and then pasted onto the same sheet. An example is a Parts List. (this was an edit, I forgot this one).
- You can't copy Views that are "child" views unless you also copy their parent view (such as Projections, Details, Sections, etc.).
- Sometimes doing certain operations will "clear" your copied objects with no warning. I haven't been able to figure out which operations do this, I just know it happens fairly often.
Like I said, these all make for a very frustrating copy/paste experience in drawings. The best advice I can give is this:
When in doubt, right-click and make sure the "copy" or "paste" button (whichever you're trying to do) is actually there.
If it's not, you're probably breaking one of the "rules" above (or another one that Inventor felt like dreaming up that day).
Hopefully knowing those quirks helps ease your copy/paste woes somewhat! (Of course, fixing them would ease them much more...). 😉