Trick Customize Conversation

<article class="message message--conversationMessage {{ $message.isIgnored() ? ' is-ignored' : '' }} {{ $message.isUnread($lastRead) ? 'is-unread' : '' }} js-message" data-author="{{ $message.User.username ?: $message.username }}">

<article class="message message--conversationMessage {{ $message.isIgnored() ? ' is-ignored' : '' }} {{ $message.isUnread($lastRead) ? 'is-unread' : '' }} {{ $message.user_id == $xf.visitor.user_id ? 'ctaConversationMessageSelf' : 'ctaConversationMessageOther' }} js-message" data-author="{{ $message.User.username ?: $message.username }}">

// messenger style conversation layout modification thing (www.wikiba.eu)
[data-template="conversation_view"]
{
    <xf:set var="$ctaMessageSelfSide" value="right" /> // side for own messages - right or left
    <xf:set var="$ctaMessageSelfAvatar" value="yes" /> // display your own avatar - yes or no
    <xf:set var="$ctaMessageAttribution" value="no" /> // display the message date and time and [New] indicator - yes or no
    <xf:set var="$ctaMessagePointer" value="top" /> // pointer location for the message containers - top, bottom, or none
    <xf:set var="$ctaMessageOnline" value="yes" /> // display the online now indicator - yes or no
    @__ctaMessageRadius: 25px; // radius of message containers - between 10px and 30px works best
    @__ctaMessageWidth: 80%; // width of messages - between 50% and 85% works best
    @__ctaMessageSelfColour: @xf-paletteNeutral1; // colour of your messages
    @__ctaMessageOtherColour: @xf-paletteColor1; // colour of the messages of other participants

    .block
    {
        & .message
        {
            border-radius: @__ctaMessageRadius;     

            &--conversationMessage
            {
                width: @__ctaMessageWidth;
            }
 
            &-cell--user
            {
                visibility: hidden;
                border: none;
                flex: 0 0 118px;
            }
 
            &-avatar
            {
                visibility: visible;
 
                &-wrapper
                {
                    margin-bottom: 0;
                }

                &-online
                {
                    <xf:if is="$ctaMessageOnline == 'no'">
                        display: none;
                    </xf:if>
                }
            }

            &-userDetails,
            &-userExtras,
            &-userArrow
            {
                display: none;
            }

            &--quickReply
            {
                border-radius: inherit;
            }

            &-attribution
            {
            <xf:if is="$ctaMessageAttribution == 'no'">
                display: none;
            </xf:if>
                border: none;
                    &-main
                    {
                        float: right;
                        margin-left: 4px;
                    }
            }

            &-body
            {
                margin: 0;
            }

            &.ctaConversationMessageSelf
            {
                background: @__ctaMessageSelfColour;

                <xf:if is="$ctaMessageSelfAvatar == 'no'">
                    & .message-cell--user
                    {
                        display: none;
                    }
                </xf:if>
            }

            &.ctaConversationMessageOther
            {
                background: @__ctaMessageOtherColour;
            }

            @media (max-width: @xf-responsiveMedium)
            {
                border-right: 1px solid @xf-borderColor;
                border-left: 1px solid @xf-borderColor;

                &-cell--user
                {
                    padding-bottom: 0;
                }

                &-avatar .avatar
                {
                    width: 32px;
                    height: 32px;
                    font-size: 20px;                   
                }
            }

        <xf:if is="$ctaMessageSelfSide == 'right'">
            &.ctaConversationMessageSelf,
            &--quickReply
            {
                margin-left: (100% - @__ctaMessageWidth);
 
                & .message-inner
                {
                    flex-direction: row-reverse;
                }
            }
 
            &--quickReply
            {
                margin-left: 0;
            }

            @media (max-width: @xf-responsiveMedium)
            {
                &.ctaConversationMessageSelf,
                &--quickReply
                {
                    & .message-user
                    {
                        flex-direction: row-reverse;
                    }
                }

                &.ctaConversationMessageOther .message-attribution-main
                {
                    float: left;
                    margin-left: 0;
                }           
            }

            <xf:if is="$ctaMessagePointer == 'top'">
                &.ctaConversationMessageSelf
                    {
                        border-top-right-radius: 0;
                    }

                &.ctaConversationMessageOther
                    {
                        border-top-left-radius: 0;
                    }
            <xf:elseif is="$ctaMessagePointer == 'bottom'" />
                &.ctaConversationMessageSelf
                    {
                        border-bottom-right-radius: 0;
                    }

                &.ctaConversationMessageOther
                    {
                        border-bottom-left-radius: 0;
                    }
            </xf:if>
        <xf:else/>
            &.ctaConversationMessageOther
            {
                margin-left: (100% - @__ctaMessageWidth);
 
                & .message-inner
                {
                    flex-direction: row-reverse;
                }
            }

            @media (max-width: @xf-responsiveMedium)
            {
                &.ctaConversationMessageSelf .message-attribution-main
                {
                    float: left;
                    margin-left: 0;
                }

                &.ctaConversationMessageOther .message-user
                {
                    flex-direction: row-reverse;
                }
            }

            <xf:if is="$ctaMessagePointer == 'top'">
                &.ctaConversationMessageSelf
                    {
                        border-top-left-radius: 0;
                    }

                &.ctaConversationMessageOther
                    {
                        border-top-right-radius: 0;
                    }
            <xf:elseif is="$ctaMessagePointer == 'bottom'" />
                &.ctaConversationMessageSelf
                    {
                        border-bottom-left-radius: 0;
                    }

                &.ctaConversationMessageOther
                    {
                        border-bottom-right-radius: 0;
                    }
            </xf:if>
        </xf:if>
        }
    }
}
// messenger style conversation layout modification thing (www.wikiba.eu)