Customizing the buttons, colors and layouts of your page templates is only accessible to super-users: "Developers". According to CatapultK12, developer privileges are rarely shared with school webmasters; GUHSD is unique in having several assigned developers. The reasons for restricting this kind of access are self-evident: it's very easy to break your site!
For quality assurance and in the course of continual improvementC, atapultK12 occasionally modifies core elements of a school's templates and in so doing, overwrites any changes a developer may have made to the original files, including the HTML, CSS, JS and image components. Until recently, Site Variables were also overwritten. While extra care is now being taken by the company to avoid resetting site variables, it is still a manual process subject to human error.
For these reasons, the following precautions are strongly advised. Failure to follow them will sooner or later mean your site will look and/or behave differently from what you intend.