recreate scale and move action seen in Keynote tutorial

Welcome to the forum, and to the Mac!

Combining actions and builds is pretty simple, and is done in the Build Order flyout drawer in the Action Inspector palette. Create your move action, then click the small "Add Action" plus sign at the bottom of the Action palette to add your scale action. When you add this action, the Build Order drawer will appear, listing the actions/builds for the slide. In order to combine actions/builds, you simply need to select an action and in the bottom "Start Build" drop-down menu choose "Automatically with build #" (where "#" is the prior build). After doing this, your object will move and scale simultaneously (and could also rotate and change opacity, if you wanted, as all these actions can be put together in any combination using this technique).

This procedure is also how you get multiple objects to build in or out together. Playing with the time delay for the build (just below the "Start Build" dropdown) can also produce some very nice effects.