Follow the instructions below for editing Master pages in a SharePoint site
1. On the Site Actions menu, click Site Settings.
Note: On a site for which the Site Actions menu is customized, point to Site Settings, and then click the settings that you want to view.
2. In the Galleries section, click Master pages.
3. Click the master page that you want to edit.
4. Click Edit to a edit a master page by using a Windows SharePoint Services compatible Web design application.
With the best SharePoint hosting price plans in the industry, Apps4Rent provides any sized business the power to integrate the virtual collaboration technology into their business model and streamline communications at a minimal SharePoint hosting price rate of $8.95 per month.