The structure for your Library should follow a structure that you can understand and use.…
cadmovie015 – Symbol Insertion Options
When you create a symbol you get an options dialog where you can set options on how the symbol will be inserted.
For detail symbols like slabs and windows you often want to edit the symbol to change a note applicable to the project, adjust the lines in the detail to match the situation or change the cladding to suit the project. When you insert the symbol you will find it easier to convert the symbol into a group before editing.
cadmovie015