Original Q: sounds like you simply want a different view of the part in your vport than you have of the part in model space? If so, this is VERY easy:
Since ACAD uses each P-Space vport as if its a complete Model space environment, all you have to do is go to the tab (p-space), click inside the viewport, and use any zoom or rotate-view you want, to get the view you want.
(If I'm doing alot of re-zooming and other work inside the viewport, I like to zoom-w closely around the outside of the vport, to make it almost the whole display, and then re-clicking inside the viewport for my work.)
If you want to convert the image in the vport from the model to a "detail" of the part at the view you've selected, use the soldraw command.
If you later decide to change that detail by altering the zoom of the part for a different look for your detail: in that vport, freeze the 2 layers - hidden and visible - that the detail line work are on, thaw the layer the model(s) is/are on, re-do your zoom/rotate, re-thaw the 2 layers (hidden & visible), ignore that the linework is sitting on top of the model, and re-run the soldraw command. ACAD will clean up the old line-work, create new line work, and re-hide the underlying model, leaving the developed view. Very Cool!
God luck,
C. Fee