How to assign one appearence to several plots inside one graph?

Hi

From MC15 help:

3D Plot Format Dialog Box (Appearance Tab)

If there is more than one plot in the graph, these options are specific to each plot. Each plot can be filled with its own color, have its own lines drawn, among other options. The tabs labeled Plot 1, Plot 2, and so on, control the settings for individual plots.

My question:

How to assign one appearence to several plots inside one graph?