When working with SharePoint, there may always be an occasion where you want to apply some specific styles to appear only when a page uses a specific Page Layout. For example, your Master Page may contain a Left Navigation that is needed throughout the site, but you may want to hide it just on your Landing Page Layout.
There are basically 3 ways in which this can be achieved:
01. Custom Style sheet
In your custom Page Layout, search for id=”PlaceHolderAdditionalPageHead“. You’ll find it in an opening tag that looks like this:
<!–MS:<asp:ContentPlaceHolder id=”PlaceHolderAdditionalPageHead” runat=”server”>–>