The Grid Navigation Bar is used above many grids used through out My Pricebook. The grids are full of information that are organized into rows called records. Each row or record has fields. Fields are columns in the rows.
This navigation helps you move up and down the rows as well as insert and delete rows. This is done by clicking on the desired icon on the nav bar.
The functions are described below.
Change Location
These arrow move your position up and down the grid with out changing any data:
These tools insert a row, which is adding new data to the grid or delete an existing row.
You can insert data anywhere in the grid. Inserting in a specific position does not mean the row will stay where the it is inserted. Row position in the grid is dependent on the way the grid is sorted. Click here for a sort explanation.
Set the position in the grid of the row to be removed and click Delete. A confirmation box will ask if you are sure. If you click yes the row is deleted. This is not reversible.
First moves to the top or first row of the grid.
Prior moves 1 row up from the current location.
Next moves 1 row down from the current location.
Last moves to the bottom or last row of the grid.
You can insert data anywhere in the grid. Inserting in a specific position does not mean the row will stay where the it is inserted. Row position in the grid is dependent on the way the grid is sorted. 
Report will let you print a report of the rows in the grid.
Will save your spot in a grid. When you come back to the grid you can use the Go To Spot tool to to back to the same spot in the rows in the grid. 
Works with the Save Spot tool. See above.