Sometimes, when you are new to SAP and working at an end user level. It gets little difficult to get to know all the hidden gems of SAP. Like ALV Grid, Once the report output is displayed. It provides a lots of options to modify the on-screen data which are usually ignored.
Have a look at this attached manual here. This will provide you with tips on Modifying columns, Working with subtotals, Changing the report layout to suit your needs and then save and retrieve the layout changes. It also provides tips on integrating the Report into Microsoft office.
Download the manual on
ALV Grid for end users and sample ALV abap programs.