How do I change the backgroud of a cell or a whole section?

Hi Xarzu, 

Here's how you can do it using the built-in options:

1. Select the cell or range of cells you want to format.
2. Right-click on the selected cells and choose "Format Cells" from the context menu.
3. In the Format Cells dialog box, go to the "Fill" tab.
4. Choose the desired background color from the color palette or enter a custom color.
5. Click "OK" to apply the background color to the selected cells.

And here's how you can do it using conditional formatting:

1. Select the cell or range of cells you want to format.
2. Go to the "Home" tab in the Excel ribbon.
3. Click on the "Conditional Formatting" button in the "Styles" group.
4. Choose the desired conditional formatting rule that fits your criteria. For example, "Highlight Cells Rules" > "Equal To" to highlight cells with specific values.
5. In the "Edit the Rule Description" section of the dialog box, specify the value or formula you want to use for formatting.
6. Click on the "Format" button to choose the background color you want to apply.
7. Click "OK" to apply the conditional formatting rule.

Best Regards.