An electronic key holder KeyGuard understands hierarchic lists of keys (groups). This means you can create a list of keys, which, for its part, includes nesting lists (up to 7 nesting levels). Each list has its own name. You need to include this list in the key access level of a user in order to give keys according to the list. If keys are returned, you have to select a section for work with lists in the key holder menu, select a required list from the table and get keys back.