Hi there fildil.
If you have the game manual its all outlined on page five.
If you don't: The Resume Button in the Table of Contents Screen puts you right back into the game where you ended previously. If you use the OPEN BUTTON (and after seeing "the tip of the day") you can choose from a list of all your save games.
To actually save during the game .....In the Menu Bar (appears if you put your cursor upper left screen) of the game screen use the Save option to save your game and just key in a title each time. You use Ctrl-C to clear away the previous save game title.
Love, Witchen =O)