In the Appearance tab you have the possibility to adjust the color scheme of the document. If you click on the little arrow in the lower right corner (see picture) the following dropdown list opens:

 

 

Here you have a selection of color schemes. You can save layouts and later load them again. In order to save everything go on Save the current theme to a file. The following window appears:

 

 

Enter a suitable name and then click on Save.

To load it again go on Load a theme from file. This dialog appears:

 

 

Choose a design and then click on Open. It will now be applied to the current document.

 

These are the features of the Appearance tab.