The home key will take you to the beginning of the line you are on - try it, type a bunch of stuff then hit the Home key and you will be brought to the beginning of the line. If you are in a multi-line document, hitting CTRL+Home will bring you to the start of the entire document.
Similarly, the end key will take you to the end of the line while CTRL+end will take you to the end of the document.
Similarly, the end key will take you to the end of the line while CTRL+end will take you to the end of the document.
