In this article i will explain how to enable sharepoint design manager?
Design Manager is a new feature in SharePoint 2013 that puts some structure around management of branding and styling SharePoint sites and pages. It is only available on SharePoint Server and only with Publishing sites, or on sites where publishing features have been enabled.
With Office 365, you will need a level that has publishing enabled.
If you’re starting from a publishing site, it’s pretty easy to access. You can just click the Settings menu item and the Design Manager is available.