If there is no rotate option available for displays connected through a dock, check that DisplayLink software is installed.
If the DisplayLink Manager is installed do the rotation through that instead of using the System Preferences: Displays rotate option (which is not available). If this fails, check the DisplayLink software is fully up to date.
My latest blog post: Suicidal Empathy: We need empathy, but not suicidal empathy. (posted 2025-10-08). Warning: mysqli_connect(): MySQL server has gone away in /Library/WebServer/Documents/Owen2/Inc/Footer.m.inc.php on line 51
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