Hi WRob
I generally use dual preview displays when using effectsas it shows what is happening to both Clip and Sequence. This is set under Options/Display.
Not exactly sure of what you are aiming for but to reposition the video..
Click the FX box at the start of the clip on the timeline. This opens the list of effects.
Click the green + and select the Position effect This places a white line box around the Clip Preview frame.
Grab the box and drag the clip to a new position The area exposed by the displacement will be chequered indicating that it is transparent. If the clip you repositioned in on an upper track any videos below it will be visible in the transparent area.
That's it...... but what do you mean by ....put parts of the picture away? and ...to add a Zoom as an afterthought?
Are you wanting to split off a section of the clip to use elsewhere in the project, perhaps with a zoom?
You can split a clip and remove a section in several different ways. The simplest to understand is to move the red cursor line to the start of the section and click the scissor icon which will split the clip. Move the cursor to the end of the desired section and repeat the process. Now grab the clip between the two splits and drag it up to the clip bin. (You will see a green clover leaf when you do this) The section you want to use is now in the bin and the timeline has closed up automatically.
Nat