Rule-based images guide
Tailor your email content to individual subscribers with rule-based images!
Rule-based images allow you to serve specific images to specific subscribers based on personalized conditions. For example, a bakery could set up a rule to display different images according to a customer's favorite flavor, providing a personalized experience more relevant to your readers.
NOTE: Rule-based images are available on Litmus Enterprise and Litmus Personalize Pro plans.
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Create a rule-based image tag
Rule-based images are located in the Personalized Content section of the Litmus platform. Start from the Overview page or in the Rule-based images section of the Personalized content tab. Select Rule-based images from the left menu. Here, you can create a new tag and find any you've already created. Select New rule-based image in the upper right corner.
Add images and set conditions
Your rule-based image's default name is the template name but you can edit it to whatever you prefer by clicking on the name on the top left.
On the left, upload images for different conditions you'd like to cover using the Upload image buttons. Two rule-based images and a fallback image are available by default, but If you need more than two images you can add as many as you need using the Add image button above the fallback image section.
With your images uploaded, select a condition for that image to appear, and add the corresponding merge tag value in the field to the right. There are a number of conditions you can select here, defined below.
In the Click-through URL field, add a URL for each image to send your subscribers to a corresponding landing page!
Be sure to add a fallback image! This is what will appear if the email is opened with no matching value for the parameter you set.
Condition operators
You can set one condition per image using the drop-down menu for condition operators.
The operators here are defined as follows:
| equals | parameter matches merge tag value exactly |
| contains | parameter partly matches merge tag value |
| is any of | parameter matches one of multiple comma-separated values |
| empty | parameter contains no value |
| is not empty | parameter contains any value |
Set your parameter with a merge tag
On the right side of the design tab, you can define your parameter and enter your merge tag in the Data inputs section.
A parameter is a string of text in your HTML that's set equal to your merge tag. We recommend naming your parameter similar to your merge tag for easier reference.
Merge tag values represent recipient data stored in your ESP. If your merge tag is %%cake.preference%%, a merge tag value could be "vanilla" or "lemon".
Merge tag values are not case sensitive. Your ESP will automatically replace your merge tag with the merge tag value for each recipient at the time of send.
Preview your rule-based image
When you have added your images, parameter, and set your conditions and click-through URLs, select Next: Preview your rule-based image in the top right corner. Here, you can enter a merge tag value to preview the resulting image and ensure your parameter is working.
When you are sure your conditions are set correctly, select Next: Save and get HTML in the upper right to finalize your rule-based image and get your HTML tag.
Add a rule-based image to your email
To add a rule-based image to your email, copy the code generated and add it to your email's HTML. You can quickly copy the tag by hovering over the image's thumbnail and selecting Copy HTML. Edit your title in your rule-based image library as well!
Impression usage
A rule-based image will count as one impression.
NOTE: Impressions usage limits vary based on your subscription. Learn more about usage limits and how impressions are counted to make sure you understand how your tag will impact your usage!