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Custom Content Width
v1.0.2 · by George Stephanis
Adds a 'Custom Content Width' setting to the Settings > Media screen, to let users override their theme's content width.
About this plugin
Occasionally, themes forget to set the $content_width variable in functions.php. If they forgot, or if you’d like to change the value that they’ve set, this will let you in your Settings > Media screen.