Image Manager (IM) automates image processing and offloads the creation of images in various sizes and formats to our Intelligent Platform. When a visitor to your site requests an image, IM dynamically selects the best size and format.
Image Manager works in conjunction with your existing OCA configuration to deliver the right image, size, version, format, and resolution to every end user across all devices.
Enable (turn on) this setting to help improve your mobile performance. You can keep this setting off, but realize that doing so disables Image Manager's optimization of images for mobile devices and results in slower performance.
You can pick a location where the majority of your visitors are located. If the region of heaviest traffic varies, choose United States. Image Manager distributes cached objects from this location to our edge servers.
These advanced settings let you fine-tune how Image Manager processes and offloads images to Akamai’s network.
- Cache File Extension For
- The Time-To-Live (TTL) length lets you adjust how long to store the file
extensions specified, and is set to 30 days by default.Note: This TTL overrides any TTL settings current in the property’s OCA configuration caching settings.
- File Extensions
- You should identify the file extensions that you want to associate with the chosen caching default rule. You can always modify them if you want, when you want.
- Resize for Mobile
- This option scales down images to the maximum screen resolution (as determined by your end users) on smaller devices. We turned it off so your page layout would not be impacted. If you turn it on, it’s important to test your configuration on a variety of devices (with different screen sizes and resolution) to make sure your page layouts are consistent.
- Use Best Image Format
- This feature produces the smallest file size that retains image quality, based on the user agent and initial image file. Turn on to convert images automatically to the best file type for the requesting device.
Standard and Custom Policies
There are two types of policies: the default policy (which contains the default transformations, derivative image widths, and quality settings for all images in that policy set) and custom policies. If you need only one policy, then you do not need any custom policies; you can just use the default policy.
OCA supports standard (default) policies only, and we enabled those for you. If you would like to use custom policies, you must convert your OCA property to Property Manager.
To get started, review the Image Manager Quick Reference on Control Center. If you’d like a deeper dive into IM, see the Property Manager help for more information.