Note: After saving, you have to bypass your browser's cache to see the changes. Internet Explorer: press Ctrl-F5, Mozilla: hold down Shift while clicking Reload (or press Ctrl-Shift-R), Opera/Konqueror: press F5, Safari: hold down Shift + Alt while clicking Reload, Chrome: hold down Shift while clicking Reload.
if("UploadWizard"===mw.config.get('wgCanonicalSpecialPageName')){mw.loader.using('ext.uploadWizard',function(){try{varautoAdd=mw.config.get('UploadWizardConfig').autoAdd;// Add a custom category to all my upload wizard uploadsautoAdd.categories.push("Images by Clemens Stockner");// Add a custom license tag to all my files uploaded using the sorcerer// autoAdd.wikitext += "{{My custom information or re-using tag}}"; }catch(ex){mw.log("Injecting user-category into UploadWizard failed.",ex);}});}