There are a number of scenarios where you do not want SharePoint’s left navigation to show on your pages. Although, there are several options to achieve this - Create a new master page without Left Nav, Use CSS trick etc, let me explain the easiest and most flexible way to do this.
- Open the site in SharePoint Designer.
- Create a new Page Layout or start from an existing layout.
- Find the last </asp:Content> tag.
- Insert the following lines after this tag:
<asp:Content ContentPlaceholderID="PlaceHolderLeftNavBar" runat="server"/>
<asp:Content ContentPlaceholderID="PlaceHolderNavSpacer" runat="server" />
Save this as new Page Layout. Now use this page layout for those pages which don't need Left Navigation. Simple! Isn't it!