When I hit Enter after working on a single clip (or more) in the Time Line the rendering process begins. As soon as the frames are rendered, the whole project starts to play the whole project from the very beginning. Is there a way to prevent that? Also, is there a way to render some and/or all clips that are ready in the Task Panel (Organize / Project) that haven’t been used yet.
Go to Edit/Preferences. You'll see the checkbox option to play after render there.
Unfortunately, render applies only to the timeline. There is no way to render clips before you add them to a timeline -- except converting them to DV-AVIs before you bring them into your project.
Premiere elements can perform rendering only on timeline and not in the organizer panel.To avoid playback after rendering go to Edit>Preferences>General and disable the option 'Play work area after rendering previews'.this would solve your problem.