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Create a new icon - select Mars Retrieval from the list. Edit the icon and set the following parameters to retrieve relative humidity on a 1x1 degree grid on the standard MARS pressure levels:

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Icon management: rename this icon to "get_r". Now make a duplicate of the icon and rename that one to "get_t". Edit this new one, change Param to T, save the icon and now directly right-click and Visualise it. The Execute step is performed automatically for you because the data has not yet been retrieved.

If you have extra time...

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