Why is the option to reverse a clip in greyed out in Speed/Duration panel?

[SO Creative Studio]

I am a complete newbie to Premier Pro and I am trying to do something really simple.

I want to reverse a video clip, but when I select it and open the Speed/Duration panel, the option to reverse is greyed out. 

Quick video to illustrate what I am doing is attached.

Do any of you clever people know what I'm doing wrong?

[Peru Bob · Accepted solution]

Your clip is a jpeg, not a video.

It has no motion, so you can't reverse it.

[Ann Bens · Accepted solution]

Still images/photo's do not have Speed only Duration.

[SO Creative Studio]

Aha! Great I get it now. I used a still but added a pan and zoom effect, so assumed as I'd added some movement I'd be able to reverse that.

Thanks that helped a lot : )

[Peru Bob]

 I used a still but added a pan and zoom effect, so assumed as I'd added some movement I'd be able to reverse that.

By @SO Creative Studio

Switch the keyframes to reverse it.

[Jeff Bugbee · Accepted solution]

Do you mean to flip the video, as in, reverse the orientation?  You can apply this effect: