Maya is a 3D graphic editing program developed by Autodesk. Like most animation programs, Maya uses keyframes in order to produce animations. Keyframes are used to designate major changes in action in your animation. The frames in between these then render the action, such as moving an object from one place to another. Since Maya is a 3D animation program it has three axes -- width, height and depth -- upon which an animation can be manipulated.
Open Maya in Windows by selecting "Start," then "Programs," then "Autodesk," then "Maya." On a Mac open your Finder window and click on the "Applications" tab. Locate "Maya" and double click on the icon. Open your current animation by selecting "File" then "Open" and navigating to your animation project.
Select one of the objects that you have created. This will bring up the properties tab on the right side of the program. Right click on the properties and select "Set Key." This will create a keyframe for this object on frame 1 in your timeline at the bottom of your animation.
Move the playhead on your timeline forward 10 frames by dragging it. Now you can change the properties of this object, such as making it larger or moving it along one of the axes.
Right click on the properties tab again and select "Set Key." This will now set a new keyframe at frame 10. Maya will now automatically fill in the frames with the action that you have performed. For instance, if you have made your object larger you will see it grow larger over 10 frames, or about half a second.
Shift-click on the keyframe in frame 1 of your timeline. This will highlight the filled-in frames in red, allowing you to manipulate the speed of your animation. If you would like to speed up your animation, then move the right arrow to the left. This will decrease the amount of frames between your two keyframes and make the animation move faster.
Repeat this change for all of the animations you wish to speed up. Just by shortening the amount of space between keyframes, you can speed up your entire animation selectively.