Copyright is hard-coded so you won't be editing it from the ACP. Placing it directly below the footer links is likely your best option.
You can, however, make an edit to the following in \system\Theme\Theme.php
if( $functionName == 'theme_core_front_global_footer' or ( $functionName == 'footer' and $app == 'core' and $location == 'front' and $group == 'global' ) )
{
$content = $content . "\n<p id='elCopyright'>
<span id='elCopyright_userLine'>{lang=\"copyright_line_value\"}</span>
{{if !\$licenseData = \IPS\IPS::licenseKey() or !isset(\$licenseData['products']['copyright']) or !\$licenseData['products']['copyright']}}<a rel='nofollow' title='Community Software by Invision Power Services, Inc.' href='https://www.invisionpower.com/'>Community Software by Invision Power Services, Inc.</a>{{endif}}
</p>";
}