1.

The first step is to start Photoshop CS by clicking the PhotoShop CS Icon on the desk top. You can also start Photoshop by choosing Start->Programs->Adobe Photoshop CS from the Windows start menu.

2.

Once Photoshop is open, choose File->Browse from the file menu to open the Photoshop CS file browser.

3.

When you see the file browser, you should see the Photoshop sample images in the large viewing area.

If you do not see the Photoshop Sample images, use the file browser’s navigation tools to locate the Samples folder (C:\Program Files\Adobe\Photoshop CS\Samples). If you cannot find the sample images, ask your instructor for help.

When you see the thumbnail images displayed in the large Preview area, double click on the Dune thumbnail to open the file.

4.

When you see the Dune image open in Photoshop, click the close (X) button in the upper right of the file browser to make the browser disappear. Your Photoshop screen should look like the following.

Notice that you can see the file name and extension in the title bar of the canvas (image) area. The name and extension are Dune.tif. This is a TIF format image, with an RGB (red green blue) colour mode. (You can see RGB specification and Zoom level following the file name in the image title bar.) Note that you can also see the zoom level in the status bar at the bottom left of the screen.

5.

The next step is to save the file under a different name and format. To do this, select File ->Save As from the menu bar. This will display the Save As dialog box as shown.

Enter Practice3 as the name for the file, and select JPEG from the Format options list to save this file as a JPEG type. Use the navigation tools to find a location to save the file. (Remember, you do not want to overwrite the original Dune.tif file. Make sure the new file name is different.)

When you are ready click the Save button to save the file.

6.

When you click the Save button, a JPEG options dialog box will appear.

Here you can specify the quality level that the image will be saved at. In general, the higher the quality, the larger the file size will be.

Leave the quality settings at 5 for medium, make sure that the Preview check box is selected, and click the OK button.

7.

You should now see the image of the sand dune displayed as a JPEG on the Photoshop CS screen. Choose File -> Open Recent->Dune.tif to open the original Dune file.

Arrange the two images so they are side by side, (experiment with dropping and dragging the images with their title bars, and with resizing the image windows by dragging the image window borders with your mouse).

Now compare the two images side by side. Can you see a difference in quality between the TIF and JPEG formats?

8.

Next, close the Dune.tif image by clicking the close button (X) in the upper right of the Image window.

Next, close the JPEG image in the same way.

9.

Choose File->Exit from the Photoshop CS menu bar to close the Photoshop CS program.