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7. If at any stage you wish to load a previously save configuration file, you need to use the [Overlays][Load configuration…] menu item:

You will be requested to identify the configuration file (*.ocg) that is relevant to the background image that is open:

If you currently have any existing block polygons defined, you will be asked if those should remain open. In most cases you should choose [No]. If you choose [Yes] this is good method to draw direct comparison between blocks. Please note that in this case, the classification scheme being loaded will be used for all blocks that are currently active in the image:

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