After inserting an object onto a Captivate slide, you have multiple ways that you can control when the object appears on the slide. For instance, you can change the Appear After timing for the selected object on the Properties panel, Timing group.
You can also drag the left edge of the object left or right on the Timeline to change the Appear After time.
While adjusting an object's Appear After time isn't difficult, you can save yourself the effort by establishing the Appear After time before you insert the object. At the top of the Timeline, click at the exact time where you want an object to first appear. After clicking, the red box shown in the image below will appear. The red box is known as the Playhead.
With the Playhead positioned on the Timeline, the Appear After timing will already be set for any objects you insert on the slide. In the image below, I inserted three text captions after positioning the Playhead. Notice that all of the text captions are set to the same Appear After timing.
I've found that this kind of production forward-thinking will save a significant amount of production time over the life of a project. If you've got a nifty production tip or trick that you'd like to share, feel free to share them as comments.