Adding left navigation menu bar to Sharepoint 2010 Web Part page

Open your Web Part page in Sharepoint Designer.

Step 1 – Remove CSS
Around line 34 you will find a code block like the one below

<SharePoint:UIVersionedContent ID="WebPartPageHideQLStyles" UIVersion="4" runat="server">
<ContentTemplate>
<style type="text/css">
body #s4-leftpanel {
display:none;
}
.s4-ca {
margin-left:0px;
}
</style>
</ContentTemplate>
</SharePoint:UIVersionedContent>

Delete this code block.


Step 2 – Remove the overrides for the left column

Further down you will find three lines which prevents the left column for rendering.

<asp:Content ContentPlaceHolderId="PlaceHolderPageImage" runat="server"></asp:Content>
<asp:Content ContentPlaceHolderId="PlaceHolderNavSpacer" runat="server"></asp:Content>
<asp:Content ContentPlaceHolderId="PlaceHolderLeftNavBar" runat="server"></asp:Content>

Remove all three lines.

Step 3 – Save the page