Change grey background color to white

Question

In Numbers I have grey background color in some cells, when the rest of the sheet is white background. Could someone tell me what I am doing wrong. Thanks.

Answer 1

"Could someone tell me what I am doing wrong. "
Hi Wot',
Probably nothing. The default 'blank' template in Numbers contains a table which has one Header Row and one Header Column. The grey fill is there to draw your attention to the fact that these cells are different from the 'regular' cells in the rest of the table.
If you are starting a new document and you do not want any header rows or header columns, I would suggest starting with a Plain style table.
From the Blank template there are at least three routes to a Plain table:
Open a Blank document from the Templates Chooser
Click on cell A1
Go Table (menu) > Delete column
Go Table > Delete Row
You now have a table with no header columns and no header rows
Open a Blank document from the Templates Chooser
Click on any cell to activate the table.
Go Table (menu) > Header Rows > 0
Go Table > Header Columns > 0
You now have a table with no header columns and no header rows.
Open a Blank document from the Templates Chooser
Click on the Table 1 icon in the Sheets list to select the tabel.
Press delete.
Click the Tables button in the Toolbar and select Plain from the pop-up menu.
You now have a table with no header columns and no header rows
For more information on how Header Rows and Header Columns differ from regular cells, see the Numbers '09 User Guide, Chapter 3, Working with Tables, with particular attention to the section on Working with Rows and Columns in Tables, starting (in the edition I have) at p 56.
You can, and should, download the guide through the Help menu in Numbers.
Regards,
Barry