When adding text transitions, make sure you are in the Master Slide view. This will help you ensure that changes made to the Master will apply to all slides within the presentation. This will certainly save you time in the end.

Click on the title area (or body area) and go to Slide Show and click on Custom Animation. A Custom Animation dialog box will appear with several options.

Choose the object to animate first. In the Check to animate slide objects window, click in the box next to the object (e.g., Group, Title, Text, Picture).

Then go the Effects tab. Click the down arrow to bring a drop-down menu of animation effects (in the section called Entry animation and sound). Select the effect you want and preview the effect by clicking on the Preview button. Sound can also be applied as well as a Dim feature (as one object enters the slide, the previous object changes color). In addition, one can choose how the text will be introduced (all at once, by word, by letter) and how the different level paragraphs will enter the slide (1st level is the main topic; 2nd level is the sub-topic; 3rd level is the sub of the sub-topic).

Go to the Order and Timing tab to enable the Animation. Here, one can choose whether the object will come into the slide by Mouse Click (control when each bulleted item appears on the screen) or Automatically (can also select the seconds to delay the entrance of the object).

Now, click on the body text area (or sub-title if you are on the title slide), and go to Slide Show and click on Custom Animation. The same dialog box will appear. Repeat the same process for choosing your animation effect. Or, if you are already in the Custom Animation window, just click another object to animate and perform the same operations as above.