How to Disable Right Click on wordpress Dashboard(Admin Area)

Question

Use the selector .wp-admin to make sure you are selecting only the wordpress admin area.

html body.wp-admin {
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

The code above will prevent the user from selecting/highlighting the page content.

If you really want to disable right click, just use a simple JS code like:

<script>
document.oncontextmenu = new Function("alert('Right click is blocked.'); return false");
</script>

References: