The {url} is the web page URL you want to capture in the screenshot..
The format {jpeg png gif} is an image format to use for the screenshot default is jpg..
The {cache expiration} is a number of days a screenshot should be used before a new one is created default is 14..
The {wait in ms} is a number of milliseconds to wait before capturing the screenshot default is 200..
The {href title} is a title text for the image alt and title attributes..
The link {yes no} value will determine if the image is linked to the web page URL or not..
The refresh {yes no} value includes javascript to retry the image every second until it's available for a maximum of 10 seconds..
Click the Install Now link for the plugin..
By the way you can use screenshotmachine. com`s API directly without the plugin on website which runs on another CMS.
Browse the code check out the SVN repository or subscribe to the development log by RSS....
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