Changing the Look of your Icons on ECO2.
You can change the look of your icons to be more custom to you. To change the visual appearance of your icons, select your Toolbox key, then go to Feedback Menu. From here you will see the Skins Option. 
When selected you will find the following options.
Note that when Display Skin is set to PRC Modern the background color changes from white to black.
When set to Modern, you have the option to change many background colors of various features. Above you will notice if a background color has been changed or is still set to default by what is in the option boxes. Skin Default versus Custom.
Above you see an example of the Unity 15 Talk page set to Pretty Icons - OFF and Display Skin set to Classic.
Above you see an example of the Unity 15 Talk page set to Pretty Icons - ON and Display Skin set to Classic. You will notice when Pretty Icons are turned ON, you have more shadowing on the keys which gives a 2-D effect.
Above you see an example of the Unity 15 Talk page set to Pretty Icons - OFF and Display Skin set to PRC Modern.
Above you see an example of the Unity 15 Talk page set to Pretty Icons - ON and Display Skin set to PRC Modern. You will notice once again when Pretty Icons are turned ON, you have more shadowing on the keys and when set to PRC Modern you get a 3-D effect.