# Walls

Learn how to set properties for walls in charts and visualize the back of the plot area with solid color fill in this comprehensive guide.

## Content

A wall is the area (or plane) behind, below, or to the side of a chart.
![壁面](https://cdn.mescius.io/document-site-files/images/2238e618-a1fb-45a6-9ce5-9a4157bd2931/images/chartwalls.png)
A wall can have a border, fill effect, or width (measured in model units). The wall can be visible or hidden. The axis grids (major and minor) and stripes are painted on the walls. The axis grid lines (major and minor) are painted over the axis stripes.
See the following for more information on how to set properties for walls:

* [Wall](/spreadnet/api/latest/online-win/FarPoint.Win.Chart/FarPoint.Win.Chart.Wall.html)
* [YPlotArea](/spreadnet/api/latest/online-win/FarPoint.Win.Chart/FarPoint.Win.Chart.YPlotArea.html)

## Example

The following example shows the back of the plot area and fills it with a solid color.

```csharp
FarPoint.Win.Chart.YPlotArea plotArea = new FarPoint.Win.Chart.YPlotArea();
plotArea.BackWall.Visible = true;
plotArea.BackWall.Fill = new FarPoint.Win.Chart.SolidFill(Color.Aquamarine);
```

```vbnet
Dim plotArea As New FarPoint.Win.Chart.YPlotArea()
plotArea.BackWall.Visible = True
plotArea.BackWall.Fill = New FarPoint.Win.Chart.SolidFill(Color.Aquamarine)
```

## Using a Chart designer

1. Run the **Chart Designer**.
2. Select the target **Plot Area** from the tree menu on the left.
3. From the **Other** section of the property list on the right, expand the **BackWall** tree and set its properties.
4. Click OK and close the **Chart Designer**.

> !type=note
> **Note:** For information on starting [Chart Designer](/spreadnet/docs/latest/online-win/overview/spwin-designerguide), refer to Chart Designer in the [SPREAD Designer Guide](/spreadnet/docs/latest/online-win/overview/spwin-designerguide/fpchart-chartdesigner).