What does 'Range' do in the menu element?
The 'Range' in the menu list item element sets which list items at the current level the settings should apply to.
Acquia Cohesion renames to Site Studio from version 6.2. Tell me more.
Yes, you can render react components.
Yes, the component link field supports both internal and external URLs.
Yes, you can add custom functionality to your site through the use of custom Drupal modules, sub-themes, and custom elements.
Yes. If you're a developer you can create your own custom elements. These will appear within the 'Custom element' category in the Sidebar browser.
Yes. If you develop your own Custom elements you can use them within Components and make their fields editable within your them.
The Youtube video embed is responsive so it should expand to the width of its parent. If you do need to set a width you can apply the Width CSS property through the Style Builder.