Ok, I am absolut beginner, so please do not laugh. I am trying to edit my first video and I have one problem which I completely do not know how to solve. When I have clicked on the clip which is placed on the Timeline, his resolution changed (enlarged, similar to close up). And it is happening when I am clicking on the picture which I am editing (in the Source panel) as well as when I am clicking on the clip sitting on the Timeline. Video is enlarging and there is difference between preview and Source. It is exporting enlarged. What am I doing wrong and what is the solution here to fix it. Please help.

Hi - I assume when you say enlarged you mean zoomed in? I'm not a Premiere Pro user, but a quick search turned up a couple of references to unintentional zooming in -- it was suggested that when that happens the resolution of the clip[s] may not be not the same as the resolution of the sequence, and sequence settings should be adjusted..? Again, as I'm not a Premiere user I can't explain or clarify, but several users suggested that as a reason for unintentional zooming, so maybe it would be worth looking into.. I've attached a link [at the top of this thread] to a basic Premiere Pro course, maybe there'll be something in there that will help, or perhaps an experienced Premiere Pro user/guru will have a more specific suggestion..

Thank you for your answer. I will follow your advice :)

I have the same problem. I fixed it once but I cant remember how. If I find out I will let you know