Your Mac lets you decide which, if any, applications open automatically each time you log into your account in Mac OS X Leopard. For example, you might want iChat and Mail to open every time you sign on. These automatically opening programs are called Login items, and here’s how to manage them.
From the Apple menu, choose System Preferences and click on the Accounts button. Click on your account name (if it’s not already highlighted), then click the Login Items tab. A list of all Login items appears.
You can remove programs by selecting them and clicking the minus sign, or add new ones by clicking the Add (+) button and navigating to the desired application. If you check the Hide box next to the program name, the application will open automatically, but won’t be displayed onscreen until you select it in the Dock or via the Command-Tab key command (which cycles you between all open applications).
Login Items don’t have to be applications. You can also choose to automatically open individual documents, folders, or disks.
As you might expect, adding Login Items increases your startup time. Also, note that only a user designated as the computer’s Admin can modify Login Items.