The steps below show you how to create a transparency screen with the
Preview app on which to create text that can be imported into iMovie and used
in the Picture in Picture to insert text into a video. It looks a little
complicated but once you go through the step by step instructions hopefully it
will work for you.
1. Open a photo in Preview. Put a duplicate of any random
photo on your desktop and click on it to open it in the Preview app on your
Mac. Just double click on the photo and it will open in Preview by default.
2. Create a transparency screen. In Preview, do an
Edit/Select All, Edit/Delete. If a pop-up box asks if you want to convert
to .png, say yes. You will be left with a blank transparency
screen. Do a File/Save to your desktop. You should now have a
gray transparency screen.
3. Create Text from the Preview Annotations item. Open
your transparency screen in the Preview app and then, in the Preview menu bar,
click on View/Show Markup Tool Bar. Again in the menu bar, click on
Tools/Annotate. In the menu box that appears, click on Text. A
text box will appear in the transparency screen. You can select
your font, font size, and color from the tool bar at the top of the
screen. The “A” is the text tool. Then
do a File/Save to your desktop..
4. Drag into an iMovie project. Drag the saved
transparency screen with the text in it into an iMovie project and overlay it in
the upper timeline above the clip in which you want to place the text.
5. Create a Picture in Picture. Select the overlayed text
clip by clicking on it. Click on the overlay icon (the
one that looks like overlapping squares) in the tool bar at the upper right of
your iMovie screen. Choose Picture in Picture from the selection
box. The text will appear in the preview screen overlaid on
the clip beneath it.
6 Adjust size and position of the Text. Adjust the size and position of
the overlayed Text by dragging the corners
of the edges of the box that contains
the text. Drag the corner to make it
bigger or smaller. With your cursor move the text to the position on the
screen that you want.
This link to the online Help menu explains how to use the Picture in
Picture effect: https://help.apple.com/imovie/mac/10.1/#/mova1aaa682b
-- Rich