All CrestaProject themes have the theme options. Through this panel you can perform various operations such as changing the text color, add a background, add a logo, favicon, move the position of the sidebar, etc … (the features are different depending on the theme bought).
To access the theme options just go to your the WordPress Dashboard and, via the WP menu, go to Appearance-> Theme Options.
Here is a screenshot:
Some of our themes (the most recent ones) do not have a theme options, but all the options are placed inside the WordPress customizer.
To access the customizer go to your WordPress Dashboard in “Appearance-> Customizer”.