Hello, I have what is probably a stupid question, with a simple answer: I cannot move the play head with the cursor. I've imported a video and a jpg and moved them onto the timeline, but can't do a thing from here. I see from tutorials that the playhead should be green: mine is blue. I have tried adding a keyframe to no avail. I'm using a PC if that helps, and CC 2019. I'm a complete novice but familiar with other Adobe CC programs. Any advice eagerly accepted. Thank you.
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