Re: How to edit this part of the default template?
You’re on BP 1.1.3, right? The userbar.php and optionsbar.php files – the two verticals you have there – are located in bp-sn-parent theme. The calls to both the userbar and options bar are made in made in bp-sn-parent theme’s header.php:
<?php locate_template( array( 'userbar.php' ), true ) /* Load the user navigation */ ?>
<?php locate_template( array( 'optionsbar.php' ), true ) /* Load the currently displayed object navigation */ ?>