storybook-manager.js

import { addons } from '@storybook/addons';

addons.setConfig({
  isFullscreen: false,
  showNav: true,
  showPanel: true,
  panelPosition: 'right',
  enableShortcuts: true,
  isToolshown: true,
  initialActive: 'sidebar',
  sidebar: {
    showRoots: false,
    collapsedRoots: ['other'],
  },
  toolbar: {
    title: { hidden: false, },
    zoom: { hidden: false, },
    eject: { hidden: false, },
    copy: { hidden: false, },
    fullscreen: { hidden: false, },
  },
})

storybook-preview.js

import withEvents from 'storybook-auto-events';
import "./style.scss";
import Vue from "vue";
import { INITIAL_VIEWPORTS } from '@storybook/addon-viewport';


export const decorators = [
    withEvents
];

// you can add mixins here


export const parameters = {
  viewport: {
    viewports: INITIAL_VIEWPORTS,
    defaultViewport: 'iphonex',
  },
  actions: { argTypesRegex: "^on[A-Z].*" },
  controls: {
    matchers: {
      color: /(background|color)$/i,
      date: /Date$/,
    },
  },
}