Open the PPT software, create a new blank document, enter a piece of text in the document, such as a famous quote, and change the design theme. As shown below.

Please click to enter the picture description

Left-click the menu Design>>Theme Style (OFFICE Theme), and the current theme style of the PPT document will change and become the selected one. Topic slides, as shown below.

Please click to enter the picture description

Left-click the menu Design>>Theme Style (Calm Theme), and the current theme style of the PPT document will change and become the selected one. Topic slides, as shown below.

Please click to enter the picture description

Left-click the menu Design>>Theme Style (Vibrant Theme), and the current theme style of the PPT document will change and become the selected one. Topic slides, as shown below.

Please click to enter the picture description

Left-click the menu Design>>Theme Style (aggregated theme), and the current theme style of the PPT document will change and become the selected one. Topic slides, as shown below.

Please click to enter the picture description

Left-click the menu Design>>Theme Style (Smooth Theme), and the current theme style of the PPT document will change and become the selected one. Topic slides, as shown below.

Please click to enter the image description