Insert > Sketch, then pick the view you wish to sketch in
You will also need to turn Extracted Edges to Associative in your view style if it is not already.
if sheet metal is your primary function then you will benifit greatly from NX. Of course you might consider Solid Edge as well which is where NX's sheet metal comes from if cost is an issue.
SDETERS, the Drafting Plus will not be available until NX7.5 and it IS an add on module.....but not for existing I-Deas customers...they get it for free
Hudson is right about getting a spaceball, makes NX a breeze to navigate in and no worries about accidentally closing a dialog. Another...
potrero, if you have access to the PLM world site, look for Drafting Plus or Drafting presentations from this years PLM World
SDETERS, I wouldn't say TC training is more important, but it is certainly important. We did our TC training only for TCII so we missed a lot of important things like...
well, for us....most I-Deas users picked up NX pretty quickly. Some did not however and are still clinging to I-Deas for dear life :-P
I think the main reason for that though is Teamcenter as opposed to NX. Also Drafting plays a large role in that as NX 2D is difficult to use compared to 2D...
easiest way is to open the part in it's own NX session. What I call isolate the part. Sometimes you may want the part to be replaced in an open assembly, so that is good too. Rule of thumb though is....if you are doing Save-As, it will affect anything you have open in your session.
Another...
I'm not sure I know exactly what you mean, but there is a button on the Sketch toolbar called "Reattach Sketch" which will allow you to redefine the plane and the horizontal reference. I would try that.
ahh yes, I always forget about simplify assembly because I don't like the way it creates ENORMOUS files when you simplify an entire assembly. I do however like that it completely solidifies your part into one solid...something linked exteriors does not do.
To get a better linked exterior, set the resolution to Very Fine, and set the chordal tolerance to a very small number (a thousandth or less). This will give you a watertight representation.