Annie,  simply click on the item (you'll get the familiar rectangle around it and it will be highlighted on the right side menu too (sitting in a car passenger side thing).

Then go to the edit drop down menu and select group:

May be a good point now to add some more info to your tool box,  If you hold down the shift key and begin clicking all your objects - highlighted on the right side menu-those can be grouped together  as in goblet, wine, stem, and base.  Then when you move one everything moves as a group

When you are through, go back to the edit menu and ungroup.

This may be a good time to begin labeling stuff, like the portion that is wine, wine, the cylinder-stem, the vextex object that will be the goblet, goblet and base.

COL:  Ye olde found out the hard way:  Yep, been there--well, in fact, still there

Thanks for the compliment  Jan