Ghost/ghost/admin/lib/koenig-editor/addon/templates/components/koenig-card-email.hbs

 <KoenigCard
    @icon="koenig/card-indicator-email"
    @class={{concat (kg-style "container-card") " kg-email-card mih10 miw-100 relative"}}
    @style={{this.cardStyle}}
    @headerOffset={{this.headerOffset}}
    @toolbar={{this.toolbar}}
    @payload={{this.payload}}
    @isSelected={{this.isSelected}}
    @isEditing={{this.isEditing}}
    @selectCard={{action this.selectCard}}
    @deselectCard={{action this.deselectCard}}
    @editCard={{action this.editCard}}
    @saveCard={{action this.saveCard}}
    @onLeaveEdit={{action "leaveEditMode"}}
    @addParagraphAfterCard={{this.addParagraphAfterCard}}
    @moveCursorToPrevSection={{this.moveCursorToPrevSection}}
    @moveCursorToNextSection={{this.moveCursorToNextSection}}
    @editor={{this.editor}}
    as |card|
>
    {{#if this.isEditing}}
        <KoenigTextReplacementHtmlInput
            @html={{this.payload.html}}
            @placeholder="Email only content..."
            @autofocus={{true}}
            @class="miw-100 bn bg-transparent"
            @onChange={{action "updateHtml"}}
            @onFocus={{action (mut this.isFocused) true}}
            @onBlur={{action (mut this.isFocused) false}}
            @didCreateEditor={{action "registerEditor"}}
        />
        <div class="kg-card-help">
            <p>
                Only visible when delivered by email, this card will not be published on your site.
                <a href="https://docs.ghost.org" target="_blank" rel="noreferer nopener">{{svg-jar "help"}}</a>
            </p>
        </div>
    {{else}}
        <p>{{{this.formattedHtml}}}</p>
        <div class="koenig-card-click-overlay"></div>
    {{/if}}
</KoenigCard>