KML Editor

KML files, or Keyhole Markup Language, are used to display geographical data within Earth browsers like Google Maps and Google Earth. They are based on XML and uses a tab-based structure with nested elements and attributes.
KML Editor is an application that makes it not only possible but easy to work with KML files.
The application is built using the Java platform and displays a comprehensive interface. With it you are able to edit raw text, merge KML files, add timestamps and timespans.
A text editor is basically what KML Editor is and that should suit you just fine since you can obtain KML code simply by right clicking a feature in Google Earth and copying the text into the editor. The code is neatly displayed and is very easy to follow. The application even highlights a row of selected text. The application doesn't excel in text editing tools as it only offers you the use of simple functions such as copy, paste, cut and select all.
Using KML Editor you can add timestamps to placemarks and change the markers. A placemark is used to mark a position the earth’s surface and can be customized with a name and various geometric elements.
KML files can easily be created from with this tool but that requires that you have some coding knowledge and experience. With your KML files in their final stages, you can use a ZIP application to create KMZ files. These contain the main KML file and supporting files which you can upload to a personal web server for sharing. This way, anyone that has Google Earth installed is able to to view your KML files.
KML Editor is indeed a practical tool if you take interest in how using KML code can be used for annotation and viewing of 2D and 3D maps.