keystrokes for duplicating an object

Holding down just the Option key and dragging the selected object(s) is (and has ever been) sufficient to duplicate the selection.

It still does work in current versions of Illustrator.

Hi Susan,

Thanks for reaching out. There has been no change in the keyboard shortcuts. I'd request checking out help article https://helpx.adobe.com/in/indesign/using/grouping-locking-duplicating-objects.html#duplicate_objects for more details.

If you want to customize these shortcuts, you may do that under Edit > Keyboard Shortcuts. Please find details under help article https://helpx.adobe.com/indesign/using/customize-menus-keyboard-shortcuts.html#use_keyboard_shortcut_sets

Hope it helps.

Regards,

Ashutosh

When did that work for you?

And how?

Selecting something and hitting that key combo resulted in?