Properties and Custom Properties commands show properties of a dimension member or cell, and their current values, in a special window.
For a cell, it can display system properties and cortege structure (Tuple) with the current values.

pivot grid cell properties

Figure 1. Cell properties window.

For a dimension member, both Custom Properties and system properties (Member Properties) can be displayed.

ranet olap dimention element properties

Figure 2. Dimension element properties window.

Dimension member properties, cell properties, and the cortege can be copied to the clipboard.