The contrast button is located in the picture effects. It can be applied to a picture or a video.
The Shapes button is located within Insert tab (or even the Home tab) of the Ribbon.
office button
Office Button
On the Quick Access toolbar.
font color
Text slide is an animation on text in PowerPoint. It can slide from top, button, left or right.
The Send to Back button.
The Autosum button.
Click the bulletpoint button on the toolbar.
Perhaps the contrast button is stuck - press the button a few times to try and release it.
Undo button
Home tab/ font group