Adding a transition using the Transitions palette
Position the edit line in the Timeline so that it is at the end of Earth.mov (6:06).
In the Transitions palette, double-click the Zoom folder or click the Expand/Collapse button () to see the transitions in the folder.
Click the Cross Zoom icon to select it.
Drag the Cross Zoom transition icon to the Video 1 transition track at the edit line in the Timeline window, where Earth.mov ends and the trimmed Eye.mov begins.
To find a transition quickly, click the Transitions palette menu, select Find, type in the name of the transition, choose Expand folders, and click Find. Premiere will locate the transition and highlight it.
The Fix Transition dialog box appears.
The Fix Transition dialog box
When you insert a transition into the Timeline, but there are not enough frames available for the transition in the head material or the tail material of the clips, the Fix Transition dialog box appears so you can make adjustments.
The dialog box identifies the two clips involved in the transition instance and indicates the status of the tail and head material. The default solution is to repeat frames and place the transition at the center of the cut.
Select or verify these options: Repeat Last and First Frames and transition placement at Center of Cut.
Now, the Cross Zoom transition appears in the Timeline. Notice that grey bars appear in the affected ends of the two clips. This indicates that Premiere has repeated the last and first frames of the clips to make the transition work properly with the available footage.