This command is available from the Part Library Manager dialog. It enables you to rebuild a library index.
What is a library index?
A library index contains a summary of the contents of a library, enabling quick searches to be made without reading the library itself. A part library index can also contain attribute values which are used, for example, by the Part Browser to sort parts by a category attribute. Only attributes which have been indexed can be used in this way.
Defining the indexed attributes
The dialog provides a list of the attributes defined in the current Part Technology, plus any currently used for indexing and any which you choose to add by typing them into the box at the bottom of the dialog and pressing the Add button. You should select those which you want in the index, then press OK to perform the indexing, which may take a few moments.