Apply a color theme on a specific layer

[bendesarts]

Hello,

I have a complex scheme I need to present.
In order to facilitate my presentation, I have used layers in my visio file.
The aim is to be able to show/ or hide different subsytems.
I would like to know if it is possible to apply a color theme only on a defined layer.
If it is possible, may you explain how I can apply a color theme only on a specific layer?
For the moment, the color is apply for all the layers. I would like to apply a color theme 1 for a layer and another color theme 2 on a different layer.
Thank you for help.

[Yacine]

You can assign a colour to a layer.
The backdraw is that the shapes on that layer will have no filling.

[JuneTheSecond]

And you can enter formula of theme color for layer line color directly in page shapesheet.
The line color of assigned layer is clearly visible, if the line is wide enough.
If a shape is assigned to more than 1 layer, I don't know what color will appear.