Oh I thought you found it, Style Properties -> Login Bar, all the login controls are there. You just need to uncheck "Disable Regular Login"
 
no its version 1.5.6 . i have only do this
Bildschirmfoto 2016-03-17 um 05.25.17.png


when you login in , there is no logout button on the Top of the right side. i see only the button of the ACP on there place
 
Oh my... I thought you couldn't see the login link...

By default there's no logout link, it's found in the user dropdown menu. You can try adding this to:

navigation_visitor_tab_after
Code:
<xen:if is="{$visitor.user_id}">
<li class="navTab customLogout">
   <a href="{xen:link logout, '', '_xfToken={$visitor.csrf_token_page}'}" class="LogOut navLink">{xen:phrase log_out}</a></li>
</xen:if>
 
I could be going crazy but I don't think we had one there. XF did have a logout link a long time ago. My fix was for the visitor tabs, notice the template name.
 

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