Ghost/ghost/admin/app/templates/components/gh-editor.hbs

<section class="entry-markdown js-entry-markdown {{if markdownActive 'active'}}">
    <header class="floatingheader">
        <span class="desktop-tabs"><a class="markdown-help-label" href="" title="Markdown Help" {{action (route-action "toggleMarkdownHelpModal")}}>Markdown</a></span>
        <span class="mobile-tabs">
            <a href="#" {{action 'selectTab' 'markdown'}} class="{{if markdownActive 'active'}}">Markdown</a>
            <a href="#" {{action 'selectTab' 'preview'}} class="{{if previewActive 'active'}}">Preview</a>
        </span>
        <a class="markdown-help-icon" href="" title="Markdown Help" {{action (route-action "toggleMarkdownHelpModal")}}><i class="icon-markdown"></i></a>
    </header>
    <section id="entry-markdown-content" class="entry-markdown-content">
        {{gh-ed-editor value
            classNames="markdown-editor js-markdown-editor"
            tabindex="1"
            spellcheck="true"
            value=value
            setEditor=(action "setEditor")
            updateScrollInfo=(action "updateScrollInfo")
            toggleCopyHTMLModal=(action "toggleCopyHTMLModal")
            onFocusIn=editorFocused
            height=height
            focus=shouldFocusEditor
            readonly=editorDisabled
            update=(action (mut value))
        }}
    </section>
</section>

<section class="entry-preview js-entry-preview {{if previewActive 'active'}}">
    <header class="floatingheader">
        <span class="desktop-tabs"><a target="_blank" href="{{previewUrl}}">Preview</a></span>
        <span class="mobile-tabs">
            <a href="#" {{action 'selectTab' 'markdown'}} class="{{if markdownActive 'active'}}">Markdown</a>
            <a href="#" {{action 'selectTab' 'preview'}} class="{{if previewActive 'active'}}">Preview</a>
        </span>
        <span class="entry-word-count">{{gh-count-words value}}</span>
    </header>
    <section class="entry-preview-content js-entry-preview-content">
        {{gh-ed-preview classNames="rendered-markdown js-rendered-markdown"
                        markdown=value
                        scrollPosition=scrollPosition
                        updateHeight=(action "updateHeight")
                        uploadStarted=(action "disableEditor")
                        uploadFinished=(action "enableEditor")
                        updateImageSrc=(action "handleImgUpload")}}
    </section>
</section>

{{#if showCopyHTMLModal}}
    {{gh-fullscreen-modal "copy-html"
                          model=copyHTMLModalContent
                          close=(action "toggleCopyHTMLModal")
                          modifier="action"}}
{{/if}}