Slide Masters in PowerPoint 2007
Use the slide master to make global changes on all the slides in your presentation. For example, if you want to insert an image that appears on all the slides or change the font color for all slides you would do that on the slide master. Accessing the slide master is a little different in PowerPoint 2007 since the old menus and toolbars no longer exist. Instead, you use the Ribbon, a tabbed grouping of commands/icons/menus related to specific tasks.
Master View
To see the slide master, you display master view. Click on the View tab as shown. In the "Presentation Views" group, click on the Slide Master button.
You can make changes to the slide master just as you would change any slide. Actual slide text, such as titles and lists, should be typed on the slide in normal view or, for headers and footers, in the Header and Footer dialog box.
When you change the slide master, changes you have made to individual slides are preserved.
A slide master is added to your presentation when you apply a design template. Usually, the template also contains a title master, on which you can make changes that apply to title slides only.
Adding an Image to the Slide Master
To add an image to all the slides in the presentation at once, you add the image to the Title and Slide Masters. Hold down the Shift key and click on the normal view button
to go to Slide Master View or go to the View tab and choose Slide Master.
Notice there are eleven slides. If you roll over them, screen tips explain they are masters for different layouts. If you have not applied a theme or template, the screen tip for the first slide says, "Office Theme Slide Master: used by slide(s)." Select this slide and go to the Insert tab to insert a picture, a logo, that will appear on all the slides. The slides shown have the Aspect theme applied from the Design tab.
Click on the Picture icon in the Illustrations group on the Insert tab. Then browse to the location of the picture you want to insert. Select it and click on Insert. It appears in the center of your slide; however, it can be moved as well as resized.
Picture Tools
When you select an image, the Picture Tools tab appears above the Ribbon. You must select this tab to use the Picture Tools toolbar. This is one of the new "Contextual Tabs," which only appear when needed for the current task in PowerPoint 2007.
Because the image is selected, the Picture Tools tab appears as shown above. Click on this to work with the picture toolbar (see below).
You can use this toolbar to resize the image, arrange it, and apply styles like drop shadows and metal frames as well as effects like beveling and 3-D rotations. Of course, you can resize the image just by dragging from the resizing circles (the white circles). This keeps the aspect ratio between the height and the width. If you drag using the squares on the sides, the aspect ratio is not preserved.
Notice that there are also cropping and resizing features on the picture toolbar in the Size group. Resize the image to .56" height and 1.5" by using the up and down arrows or by typing it in the height and width boxes as shown.
Also, notice in the Size group, there is a dialog box launcher, the little arrow in the bottom right corner of the sizing group. Click on it and it launches the sizing dialog box shown below:
You can resize and crop using this dialog box or any of the previous ways mentioned. After resizing, the image may need to be repositioned.
As you move the cursor over an image, it changes to a pointer with four-sided arrows 
. Hold down the left mouse button and drag the image to reposition it. For this exercise, reposition your departmetnal logo so that it’s positioned with its bottom edge flush with the bottom of the slide.
To center it, go to the Arrange grouping on the Picture Tools ribbon. Click on the Align dropdown list arrow and choose Align Center. Note that you can also Align Bottom instead of dragging. Use the arrow keys on your keyboard to move a selected graphic in smaller increments in any direction.
You also need to copy the image and put it on the title slide master so that it will also appear on slides with title layout like the first slide in the show. Right now it appears on all slides (except the title slides) that use the Aspect theme since it was applied to that master.
To copy the image, right-click on it and choose Copy. Go to the second master in master view, the title master, and right-click on the bottom center of the slide and choose Paste.
Changing Fonts on the Slide Master
To change the orange font color used in the Aspect theme to crimson, select the first slide for the Aspect theme in Slide Master view. Select all the text in both placeholders using the CTRL key while selecting. In the Font group on the Home tab, click on the drop-down list indicated by the black triangle beside the font color icon. Choose "Red, Accent 2" color tile, the sixth color tile from the left at the top of the dropdown palette.
The bullet colors also need to be changed. In the Paragraph group on the Home tab, select the Bullets dropdown list. Click on Bullets and Numbering to open the Bullets and Numbering dialog box.
Select the dropdown list by Color and select the "Red, Accent 2" tile to change the bullet color on the master for all the slides.
Select the Title Master and change the font color as well to the crimson indicated above. Go ahead and click on “Close Master View” on the Slide Master View toolbar to return to normal view.
If you apply more than one design template to your presentation, you will have multiple slide masters: one for each design template you've applied. So, if you want to make a change throughout your presentation, you need to change each slide master or pair of masters (depending on whether you're using the title master, too).
Add a new slide and see that the formatting change made to the slide master is applied to the new slide.
Saving
Click on the Microsoft Office Button 
to save your document. In Office 2007, the Microsoft Office Button replaces the File menu. You click on the button to open, save and print your file as shown below. You can still use the same keyboard shortcuts to open, save and print (CTRL + O, S, and P).
When you choose Save As, you have options to save in the new default file format or in the PowerPoint 97-2003 format as well as other formats. Word, Excel, and PowerPoint in Office 2007 have new file formats based on XML. Therefore, they have new file extensions to reflect this--extensions with an X at the end or an M if the file has macros.
If you select the first option, to save as a PowerPoint Presentation, the file extension will be .pptx. If the file had macros, then it would be .pptm. If you save it as a template, its file extension would be .potx. However, you can save it in PowerPoint 97-2003 format. You don't have to though since there is a file convertor that can be downloaded from Microsoft that works with Office 2003 applications allowing them to open the Office 2007 files. Just go to the Download Center to get the Microsoft Office Compatibility Pack for 2007 Office Word, Excel and PowerPoint File Formats.
The new file extension for a PowerPoint Slide Show is .ppsx. The new XML formats allow anyone with an XML editor and a ZIP utility to open Office 2007 files. The ZIP utility is needed because the new XML formatted files are automatically compressed when saved and uncompressed when opened. If you have Microsoft Office 2007, this is automatically done for you.
Return to Course Topics or go on to the next section on Inserting Headers, Footers and Slide Numbers.