How to make custom native overslide ads

Overslide ads are vertical ads that float and stick to the left or right edge of the page and disappear after a preset period, which is usually a few seconds. They usually use images that are 120 x 600. You can use native templates to create overslide ad items that are tailored to your needs.

A sample overslide ad

This feature requires the Enhanced Ads add-on. For more information on adding add-ons to your subscription, read How to change your subscription.

In this guide, we're going to create a simple overslide ad using a custom native ad template. This type of native template has all the code - HTML, JavaScript, and CSS - necessary to display the ad properly.

If you'd rather sanitize the template and have only HTML inside it, you should make your in-feed ad using a styled native ad template instead. For more information on the differences between custom native ads and styled native ads, read About native ad templates.

Templates for custom native ad items are not compatible with styled native ad items, and vice-versa.

You will learn:

  1. How to create a template for a custom overslide ad. You can customize the sample code to fit your needs.
  2. How to create a custom overslide ad item once you have a custom overslide template.

How to create a custom overslide ad template

This template will require the user to provide the URL to where the image creative is hosted when creating the overslide ad item.

  1. Click Templates in the left navigation menu. The Templates section will appear.
  2. Click Native Ad Templates. The Native Ad Templates subsection will appear.
  3. Click Add Native Ad Template. The New Native Template window will appear.
  4. Click Custom Rendering/API. The New Native Ad Template page will appear.

Selecting a native template type

  1. Name the template then add an image URL variable for the image that will be in the ad. In our sample code, we called this variable ImageURL.

Creating a custom native overslide ad template in AdButler

You can save variables and use them in other templates. After adding a variable, click on the three dots at the far right of the variable fields then click Save Variable as Template. To use a saved variable, click Add Saved Variable while creating a native template.
  1. Enter the code in the HTML Template (Custom Rendering) field, then click Save Changes.

Here's the code we used in our example:

<!DOCTYPE html>
<html lang="en">
            .overslide {
                position: fixed;
                height: 600px;
                width: 120px;
                left: -120px;
                top: calc(50% - 300px);
                transition: left 2s;

            .overslide-image {
                height: 100%;
                width: 100%;
                object-fit: cover;

            .overslide-close-button-container {
                position: absolute;
                top: 2px;
                right: 2px;
                cursor: pointer;

            .overslide-close-button {
                width: 18px;
                display: inline-block;
                text-align: center;
                color: #ffffff;
                border-radius: 18px;
                background: #000000;
                user-select: none;
        <div class="overslide-container">
            <a target="_blank" href="[TRACKING_LINK]">
                <img class="overslide-image" src="[%ImageURL%]">
            <div class="overslide-close-button-container">
                <span class="overslide-close-button" onclick="closeButton()">×</span>
            setTimeout(() => {
                document.querySelector('.overslide-container').style.left = '0px';
            }, 50);

            function closeButton() {

You can now use this template to create a custom overslide ad item.

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How to create a custom overslide ad item

  1. Go to the section of the relevant zone (Your AdButler > Publishers > Your Publisher > Your Zone) or campaign (Your AdButler > Advertisers > Your Advertiser > Your Campaign).
Custom native overslide ad items can be assigned only to Standard zones with the size set to Dynamic. The zone size can be configured only when creating a zone and cannot be changed afterward.
  1. Click Add Ad Item in the Ad Items table. The Add Ad Item window will appear.
  2. Click Native (Custom Rendering/API). The New Ad Item page will appear.

Creating a native (custom rendering/API) ad item

  1. Set the ad item's size to Dynamic.
  2. Select your overslide custom native ad template in the Template dropdown menu.
  3. Fill in the rest of the fields as needed, including the image URL. If you entered a destination URL, you can test it by clicking Open Destination URL to the right of the field.
  4. Click Save Ad Item.

Creating an overslide custom native ad item in AdButler

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