Customizer – Allow user editor to change website title and tagline

Use a plugin like User Role Editor to add the ‘manage_options’ capability to the specific users or their role. Of course, this will allow them to manage all options.

Or add PHP code like this:

$wp_customize->get_setting( 'title_tagline' )->capability = 'edit_others_posts';

https://codex.wordpress.org/Roles_and_Capabilities

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