In Garmin Que where can I set the coordinates? and I can key the coordinates in Mapking but after I search it just show a very wide coverage of map which I do not sure which part of it is the place I want to go...
This is my way (may not be the best).
Tap the flag button at the bottom bar, this will bring you to a waypoint creation page. Name the waypoint and key in the location coordinate that you have.
To view the location, go to search --> waypoint and look for the name that you've just created, highligh it and tap "Details" at the bottom bar. Then tap "Menu" --> "Show on Map". Scale your map down to, say below 200m, you will see the point of the waypoint you've just created.
First you have to Close GPS (tap anywhere on the middle of screen and tap "Close GPS" icon).
Then tap the search icon at the bottom bar, tap right arrow until you see "Lat/Long", tap on it. This bring you to the screen where you can key in the coordinates. Key in and tap go. It brings you to wide area screen and you have to zoom in to see the detail. The centre of the screen is the location.
A little problem is -- the coordinates posted here are in different format use in Mapking. You need to convert it to the same format use by Mapking (one way is to use Mapsource to change the format, or search for coordinates converter tools recommended by some bro here).