I think you are looking for the $g_bug_view_page_fields property.
1, Open your config_defaults_inc.php
2, Copy this property to the clipboard (the whole array with all elements)
3, Copy it to your config_inc.php
4, Modify it in your config_inc.php
/**
* An array of the fields to show on the bug view page.
*
* To overload this setting per project, then the settings must be included in the database through
* the generic configuration form.
*
* @global array $g_bug_view_page_fields
*/
$g_bug_view_page_fields = array (
'id',
'project',
...
);
Explicitely: To overload this setting per project, then the settings must be included in the database through the generic configuration form.