The Campaign Editor allows you to easily add or edit the layout and items in your newsletters. The editor consists of four main sections: the top menu, the left pane, the editing area, and the right pane.
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1. Top menu
When building your newsletters, you can switch between the different modes in the top menu and use the available options. The top menu is always visible whichever mode you are in.
The following table lists the modes and other available buttons in the top menu:
| Name | Description |
| Edit | Default mode when you open the editor. This mode allows you to edit and customize the layouts and items in your newsletter. |
| Comments | Comments mode allows you to add comments to a newsletter design and collaborate with team members. |
| Preview | Preview mode enables you to see what your newsletter looks like on mobile devices, tablets, or desktops. |
| Code | Code mode gives a read-only view of the HTML code of your newsletter. You can also copy the HTML code or download and upload JSON files. |
| History | History mode opens a pane with a list of saved drafts of your newsletters. You can select a draft and load it to revert your newsletter to that version. |
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Autosaves the current newsletter design and exits the editor. |
| Template Library | Opens the newsletter Template Library from the editor. |
| Send Test | Sends a test email newsletter to email addresses of your choice to check your newsletter in an actual email client. |
| Update Campaign & Continue | Allows you to save the design and continue with the campaign creation process. You can also save a newsletter as a template or save a newsletter as a draft. |
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Allows you to get help and access related Moosend articles from the knowledge base. |
| Draft save status | Indicates when your design was last saved either automatically or manually. The editor autosaves drafts every 30 seconds. |
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Hides or unhides the left pane at any time. Useful when you need to increase your workspace to edit your campaign. |
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Allows you to undo changes you've made to your newsletter design. |
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Allows you to redo undone changes to your newsletter design. |
| Clear design | Clears the design of your newsletter and reverts to an empty template so you can start from scratch. |
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Desktop newsletter view. The default view of the editor allows you to edit the desktop version of your newsletter. |
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Mobile newsletter view. Allows you to edit the mobile version of your newsletter, without affecting the desktop version. |
| Helper grid | When the Helper grid is switched on, the workspace shows what layout and items you can add to your design. |
2. Left pane
By default, the left pane is displayed in the Campaign Editor. It consists of three separate tabs for Layouts, Items, and Settings. You can use the left pane to switch between the tabs to create a layout, add items, or customize the general settings of your newsletters.
3. Editing area
The editing area is the main workspace in the Campaign Editor where you can edit and customize the layout and items in your newsletter, preview your newsletter on different devices. You can click 
or 
to zoom in or out and control how you see your design.
When you hover your mouse over an item or a layout in the editing area, a horizontal or a vertical Actions menu appears for additional options.
4. Right pane
The right pane is displayed in the Campaign Editor when you click an item or a layout in the editing area. This pane contains the settings you can use to customize an item or a layout.
You can close the right pane at any time by clicking 
. You can also hover your mouse to the left edge of the pane and set the desired width by clicking and dragging the double arrow. These can be useful when you need to increase your workspace to edit your newsletter. 