Start the Photoshop Elements 3.0 application. This will launch the Welcome Screen which has the following application launch links:
1. View and Organize photos - double click this link to enter the organizer mode to view and arrange your pictures systemetically.
2. Quickly Fix Photos - Use this link to enter the Quickfix mode of the editor. You can correct your picture through one click adjustments in this mode.
3. Edit and Enhance Photos - This is the standard editing mode, which has a full array of editing tools and palettes.
4. Make Photo Creations - Enter this mode to create slideshows, greeting cards, postcards etc. from your photos.
So, if you want to start editing double-click on the Edit and enhance photo link. This will launch the standard editor for you. Open your photo you want to edit in this editor and start using various tools at your disposal.