Opening files from within an application program uses the same style of dialog box as for saving files, so once you've learned how to use it for saving it's the same process for opening a previously saved file. Finding Lost Files: -F

If you have saved a file and remember the name, or the creation date, or something else about the file, you can search for it with a powerful tool that is built into the system software on your Mac.

1) If you are in an Application program, go to the Finder by clicking and holding on the Application Menu Icon in the top right corner of the menu bar. Select "Finder" and release the mouse button.
2) From the menu bar, choose File/Find... or use the keyboard shortcut -F
3) For a basic search, type the file name or a partial name in the box and click "Find". In this example, we are searching for all files which contain the word "fish" in the name:

4) The default search is "on local disks" (as opposed to remote network disks), but you can narrow the location of a search to a particular floppy disk, CD, or hard disk if you wish. Click and hold on "name" and "contains" and other search options will appear. Click on "More Choices" to create a more restrictive search. When ready to search, click Find and this "Items Found" box will appear:

5) You can double-click on any file in the upper window to automatically open it, or you can double-click on any folder in the lower window to go directly to that folder. You can also drag files out of the upper window and drop them in the trash or on the desktop for easy access.