Alt + D
You can save yourself some time when you know how to use clones. With Alt + D, a clone can be created just as quickly as a copy or a duplicate. One only needs to remember that the option exists.
The new clone will appear right on top of the original, and will follow all modifications made on the original, no matter if they affect its style (stroke, fill,…) or its shape.
The clone’s shape cannot be edited directly. Its colors can only be changed if the original has no color itself. Its size and rotation can be changed freely.
To remove a color from an object, you must ‘unset’ its paint, using the question mark button in the Fill and Stroke dialog.
To turn a clone into an independent, fully editable object, you need to unlink it from its original with Shift + Alt + D,or by clicking on the corresponding icon in the command bar.