Tables, views, stored procedures, and functions can be cloned using the appropriate Clone command from the context menu: Clone Table, Clone View, Clone Routine. The clone commands open the corresponding editor for a new object: the Table Editor for cloning a table, and the SQL Editor for cloning a view or a routine.
The editor is filled with values of the original object. You can modify these values in the usual manner.
To save the cloned object, use either Save or Save All buttons of the Visual Studio main toolbar, or press Control+S. Before changes are saved, you will be asked to confirm the execution of the corresponding SQL query in a confirmation dialog.