Create a Custom Desktop Slideshow

Changing your Desktop picture is easy: Just click the Apple menu and choose System Preferences. Select Desktop & Screen Saver and click the Desktop tab. Then select Choose Folder and navigate to the folder containing the picture you desire.

You can also create a custom desktop slideshow by putting the images you’d like to use inside a new folder, navigating to it as described above, and selecting one of the images. Before you close the Desktop & Screen Saver window, select the Change Picture checkbox. Using the pull-down menu, specify how quickly you’d like the images to change and whether you’d like the images to cycle in random order.

To keep things tidy, you may want to store your new custom picture folder in the same location as your default Mac OS X desktops. They reside in your root-level Library folder, in the folder called Desktop Pictures.

Create Your Own Icons

You don’t have to live with the icons your Mac displays by default. Instead, personalize your folders, files, and drives with custom icons using just about any graphic file you desire, whether it’s a jpeg, gif, png, Photoshop or Illustrator file, or even a PDF.

First, choose an image you want to use and open it in Preview. If the file doesn’t open in Preview by default, select the image in Finder, select Open With from the File menu and then select Preview from the drop-down list.

Once your image has opened in Preview, press Command-C to copy it.

Next, select the file, folder or drive whose icon you want to change, and press Command-I to show its Info window.

Click the file, folder, or drive icon at the top left corner of the Info screen, then press Command-V to replace this icon with your chosen image.

Close the Info window. The new image should appear in place of the old icon on your desktop or Finder window — even in List view.

To make your icons appear larger or smaller, go to the Finder and select View Options from the View menu. Use the slider in the pop-up window to change your icons’ display size on the desktop or in Finder windows.

You can also copy icons from the Info window of one file, folder, or drive to another. Just select the desired icon, copy it, then select the icon you want to replace and paste. Want to revert to the default Mac icon? Select your custom icon in the Info window and press the Delete key.

More Icon Tips: The most successful icons are clear, small images without too much detail, like a close-up photo of a face or a flower. You may want to crop an existing image down to a single detail in an image-editing program to create a better-looking icon — or use one of the thousands of purpose-made icons available in various online collections.

Keep in mind that using a large image as an icon increases the file size of your destination folder or file. For example, using a 3.4 MB photo as an icon for a 36 KB document increases that document’s total file size to 92 KB. Try creating a lower-resolution or smaller version of your image instead.

See Your File’s Hidden Info

Want more info on your files than the standard icon view provides (after all, it just gives you the file’s name in icon view)? Then turn on Show Item info. This adds an extra line of information below many files and folders that can be very useful. For example, now not only do you get a folder’s name, but just below the name (in unobtrusive light-blue, 9-point type), you’ll see how many items are in that folder.

If the file is an image, the Item Info shows you how big it is. MP3 files show how long the song is, etc. To turn on Item Info for your current Finder window, press Command-J to bring up its View Options. Then turn on the checkbox for Show Item Info. If you want to show the item info for every window (globally), then choose the All Windows button at the top of the dialog.

Know Your Status (Any Time, In Any Window)

The status bar (the thin little bar that shows how many items are in your window and how much drive space you still have available) was at the top of every Finder window back in Mac OS 9. In earlier versions of Mac OS X (including Jaguar), the status bar was off by default, so you had to turn it on, and then it appeared at the top of your Finder windows. In Tiger you’ll find the status bar info displayed at the bottom center of every Finder window by default (well, that’s true as long as your toolbar is visible). If that’s the case, why is there still a menu command called Show Status Bar? That’s because, if you hide the toolbar, it hides the status info at the bottom of the window, so you need the old status bar back. It’s still off by default, so to turn on the status bar, first open a window, hide the toolbar (see previous tip), then go under the View menu and choose Show Status Bar. (Note: If you don’t hide the toolbar first, Show Status Bar will appear “grayed out.”)

Switching Apps Within Exposé

Once you have Exposé invoked (you pressed either F9 or F10), you can toggle through your open applications and Finder windows by pressing the Tab key. Press the Tab key once and the next open application and its miniaturized windows come to the front. Press Tab again, it goes to the next open app. Want the previous app? Press Shift-Tab.

Adding Automation Through Folder Actions

At the office, I’m on a network and I have a Drop Box where my co-workers (freaks that they are) can send me files. However, for a long time, if a freak put something in my Drop Box, I wouldn’t know it unless they called or emailed me and told me so. But now anytime one of them drops something in my Drop Box, a message dialog appears that says, “Something freaky is in your Drop Box.” This is a simple AppleScript (think of an AppleScript as a built-in automation for your Mac, just like Photoshop actions add automation to Adobe Photoshop). Mac OS X includes some cool sample scripts (actions), or you can download about a bazillion from the Web for free.

To assign a script to a folder, Control-click on that folder and choose Configure Folder Actions from the contextual menu that appears. This brings up the Folder Actions Setup dialog, where you toggle various scripts assigned to folders on and off, or even edit scripts (if you know how to write AppleScripts). Click the plus sign (+) button at the bottom left of the dialog to add your folder to the list (this actually brings up a standard Open dialog showing your folder, so click on your folder in the dialog and click Open). Once you do this, a window will pop down with a list of built-in sample scripts you can assign to this folder, and their names give a cryptic description of what they do. Pick the one that sounds like what you want to do (to replicate my Drop Box warning, choose “add — new item alert .scpt”) and click the Attach button (you’ll see your newly assigned script appear in the column on the right of the dialog). Now click the Enable Folder Actions checkbox at the top-left corner of the dialog.This is a global on/off switch, so any folder to which you’ve attached scripts is now “activated.”

By the way, once you’ve applied actions to a folder, you can turn Folder Actions on or off globally by Control-clicking on any folder and choosing Enable Folder Actions or Disable Folder Actions from the contextual menu.

Super Shortcut to Having an App Load at Login

If you’d like a particular application to open every time you log into (or start up) your Mac, now all you have to do is Control-click (or click-and-hold) on the application’s Dock icon and choose Open at Login from the pop-up menu.

Now restart your Mac and the application will launch automatically. If you want to hide the application after it automatically launches (so it stays hidden from view until you click on it in the Dock), here’s how: Go under the Apple menu (or to the Dock) to System Preferences. In the System Preferences pane, click on the Accounts icon, then in the Accounts pane, click on the Login Items tab. Now click on the Hide checkbox next to the application’s name. Close the dialog and your application’s set.