Herb71

Hi, Apologies if this seems a stupid question. Where can I find a key to the symbols / colours used on Google maps? Or can someone kindly explain what the different colour for the cache locations represent.

Can anyone with a similar GPS tell this newbie what position format I should be using. I have selected wgs84 for the map datum, but the choice for position format does not correspond to anything I have seen written. I can select H D.D H D M.M H D M'S.S' plus all the others such as British. Please help?