How to rename a (combined) legend in ggplot2?

Is it possible to rename a legend that combines various aesthetics in ggplot2

For instance:

• Combine color with line type: Control line color and line type in ggplot legend
• Combine color with shape: How to recycle colors in the colorbrewer palette using line symbols

How can I rename such a combined legend? . When I try to use namefor scale_shape_manualor scale_color_manual, the combined legend is divided into two different legends. This is not what I want.

Possible solution: The solution I found here is: https://stackoverflow.com/a/318618/2328/ worked for me ...

In principle, there are two possible approaches, in both of them for a combined legend, in order to get a new name, nametwo different legends that are combined must be changed as one and the same:

  scale_color_manual(values = c(brewer.pal(5, "Set1") ) , name = "Combined Legend Title") +
  scale_shape_manual(values = c(1,2,3,4,5) , name = "Combined Legend Title")

or

  guides(shape=guide_legend(title="Combined Legend Title"), color=guide_legend(title="Combined Legend Title"))

Still wondering if there is an easier way to do this?