RE: master slide
1.
Create a new PowerPoint presentation, or open one that you have already created. Make sure to select a Design Template for the presentation, otherwise a slide master will not be available.
2.
Create a few slides in your presentation.
3.
On the View menu, click Master, and then Slide Master.
Along the left side of your window, there will be two slides: one to represent the slide master and the other to represent the title master. Any changes you make to the slide master will be reflected on all slides in your presentation except for slides with a title slide layout. Note that the changes that you make to the title master will only be reflected on slides with a title slide layout; no other slide layouts will be affected.
4.
Click the slide master image at the top-left of the window.
5.
To make a change in the master title area, click once within the main title area, and then make any changes you want to the font, size, style, color, or alignment.
6.
To make a change in the bulleted list, click once within the line that you want to change, and then make your adjustments to the font, style, color, alignment, or even the bullet.
7.
To add a picture to the master slide, insert clip art or a digital image the way you normally do, by selecting Picture on the Insert menu. Be sure to move the picture to a location off to the side so that it will not interfere with the text on each slide. You might need to make the picture smaller so that it will not be in the way of the text.
8.
Continue to make changes to the slide master as needed.
9.
Click the title master slide at the top-left to make adjustments to the title master.
10.
Click Close Master View on the Slide Master View toolbar when you are finished.
Notice that all slides based on the slide master will show the changes that you made,