I'm currently taking advantage of the 30 day trial for Premiere, and have some questions:

- Is there a way to jump to the end of a clip in the timeline?
- when I place an HD clip in an SD timeline, it doesn't automatically scale down. Is there a way to do this?

Ad 1. You can go to the end of the timeline or to the end of a selected clip. I believe in CS5.5 end of the timeline is default for END key, you can assign any other one, also for the later behavior.

Ad 2. In preferences there should be an option "Scale to frame size". Turn it on.

To go to back and forth between cuts use the Page Up/Down keys. It'll only move the CTI to the clips that you have the video tracks selected for though, so keep that in mind.

Home/End key go to the respective points of your Work Area.

I have tried pressing the up and down buttons on my Macbook and it doesn't jump to the end/beginning of the clip. Do I need to have the clip selected?

Hmmm, I'm a PC guy, the dedicated page up and down keys are always how I do it. I'm afraid I'm not sure how on Macs. Only ever used Final Cut on those.

I have tried pressing the up and down buttons on my Macbook and it doesn't jump to the end/beginning of the clip. Do I need to have the clip selected?

Are you sure the track is targeted/highlighted? You need to target the track in the timeline by clicking on the area to the left of the video track. It will appear a shade lighter than the other video tracks in the timeline.

And it's page up and down, not arrow up and down you are using, yes?

This is all assuming it works the same on Mac as on PC.

Indead 'page up' should work, but the timeline-window should be selected.
Otherwise you are trying to navigate another window...

Arrow left and right is moving 1 frame on the timeline.
Shift+arrow left/richt is moving 5 frames at the time.

Their should by a shortcutlist in Premiere you can read, btw...

Premiere shortcuts for Mac (http://www.allshortcuts.com/mac%20os%20x/adobe%20premiere%20pro%20cs4).

To automatically resize footage in your project:

Choose Edit > Preferences > General (Windows) or Premiere Pro > Preferences > General (Mac OS).
Select Default Scale To Frame Size.
Click OK.

If you're mixing different resolutions, you might have to manually fine-tune your resize. I just dragged a 1920x1080 clip into a 720x480 clip, automatically resized, and noticed there was some vertical letterboxing on either side of the resized clip, showing the video track below.