Chart Background
The Background page has the following options:
Background color: this setting, which is only available when Gradient is turned off, specifies the color of the chart background. To change the color, click the colored square beside this setting and select the desired color from the dialog that appears.
Gradient: turn this setting on to display a gradient of color across the chart background.
From color: this option, which is only available if Gradient is turned on, specifies the starting color for the gradient. To change the color, click the colored square beside this setting and select the desired color from the dialog that appears.
To color: this option, which is only available if Gradient is turned on, specifies the ending color for the gradient. To change the color, click the colored square beside this setting and select the desired color from the dialog that appears.
Direction: this option, which is only available if Gradient is turned on, specifies in which direction the gradient flows. The choices are Top to Bottom, Bottom to Top, Left to Right, Right to Left, From Center, From Top Left, From Bottom Left, Radial, Diagonal Up, and Diagonal Down.