Elements in the Grid 
It is possible to customize the appearance of a cell in the ALV Grid Control and display it in another color or as a pushbutton. If the element is an interaction element, the system response depends either on the additional cell information stored by the application or on how the application handles the associated event.
Output of icons or symbols in a column (field ICON or SYMBOL of the field catalog, see Formatting Column Contents)
Using hotspots, see event documentation hotspot_click in the system.