You can define the default attributes of new text boxes and shapes.
In the slide navigator, create a new slide.
If you’re setting up default attributes for a particular master slide (rather than all masters in the current theme), click Masters in the toolbar and choose the master slide.
To define a default text box, click Text Box in the toolbar and then format the placeholder text. See Creating Outlined Text for more information.
Do one of the following:
To make the text box the default for only the current master slide, choose Format > Advanced > “Define Text for Current Master.”
To make the text box the default for all master slides in the current theme, choose Format > Advanced > “Define Text for All Masters.”
To define a default shape, add a shape and then set its attributes. See About Modifying Object Size, Orientation, Outline, and More and Filling an Object with a Solid Color for instructions.
Do one of the following:
To make the shape the default for only the current master slide, choose Format > Advanced > “Define Shape for Current Master.”
To make the shape the default for all master slides in the current theme, choose Format > Advanced > “Define Shape for All Masters.”
If you don’t want the default object on the slide, delete the object.