If I look at them in their folders on my computer, they look upside down; but if I double click them, they open up in Quick Time right side up.
I added them to the timeline (in expert view) via Add Media/Files and Folders, and then to Project Assets. I trimmed them, upside down, before adding them to the timeline.
I appreciate your help.
This an interesting one and therein resides your issue and the target for the fix.
If I look at them in their folders on my computer, they look upside down
1. In this case, the Pan and Zoom Tool references the file orientation on its hard drive save location and not the file on the Timeline.
You can prove that to yourself in several ways. The quickest is to apply a tint effect to your Timeline content and then open the Pan and Zoom workspace. What you see there is the untinted version. And, the question does come up "Do you really want to be apply a Pan and Zoom Effect with video instead of stills. You might be better served by using Applied Effects/Motion Pan expanded and using its Scale for Zoom and Position for Pan.
2. The basic matter of upside down versus correct view when the file gets to Windows Explorer has a history especially with iPhone and how the cell phone camera is held. I will not go into that.
3. If you had a still in Windows Explorer, you have the option to rotate it there before import into Premiere Elements, and the Pan and Zoom tool will honor whatever orientation you select. But, you do not have rotation options for video that is saved to Windows hard drive. That needs to be done in the video editor.
If you insist on the Pan and Zoom Tool, then two possibilities would be:
a. Correct the orientation of the video before it gets to the computer and or computer hard drive save location.
b. Import your video to rotate it, after rotation export it, and then reimported the correctly oriented video into your project.
Consider the path of the video from the iPhone to outside the iPhone...
a. if you take the original iPhone video and save it to the computer hard drive, is it up side down?
b. is this upside down version only after the conversion to .mp4...if so, look into the conversion process.
Until proven otherwise, the above is my take on what you presented.
Looking forward to your observations.