When a symbol resource is deleted, all instances of the symbol in the current document can be either deleted or replaced with loci to preserve the symbol locations.
To delete a symbol resource:
1. In the Resource Browser, select the symbol definition to delete, and select Resources > Delete.
Alternatively, right-click (Windows) or Ctrl-click (Mac) on a symbol definition, and select Delete from the context menu, or select the symbol definition and press the Delete key.
2. An alert displays to confirm that the resource should be deleted. If there are any instances of the symbol currently in the document, specify whether to replace all instances with loci or to delete them completely. Click Yes.
The symbol resource is deleted and each symbol instance is either deleted or replaced with a locus.