Newbie here looking for help. In situations like these, it seems that I either provide way too little information or way too much, so I'll try to obviate that tendency this time.
SHORT VERSION
I want to use the Rotate tool to skew a face by grabbing it at its exact center and sighting along an axis, but when I try to use guidelines to find the exact center, I can only ever grab the stupid guidelines, not the underlying face. How can I do what I'm trying to do?
LONGER VERSION
I can use the Rotate tool to skew a 3-D object by selecting a face and rotating it. Consider (for example) a rectangular solid, formed by creating a rectangle and pulling it into a solid. Choose any face of that rectangular solid. I want to skew the rectangle by rotating this face.
In order to make the rotation perfectly symmetrical, I want to initially grab that face at its exact center. (It appears the Rotate tool will always rotate around the point you first click.) So I need to find the exact center of the face.
No problem; I can use guidelines. So I establish a guideline right down the vertical center of the face and another across the horizontal center. X marks the spot! I'm golden!
Oh, wait. No, I'm not. When I select the Rotate tool and then center it at the intersection of my guidelines, I am not on the face of the solid, with the dotted surface telling me I'm selecting it. Instead, when I snap to the intersection, the Rotate tool selects the guidelines themselves, rather than the underlying face!
Okay, that deeply sucks. I can't seem to figure out how to click on the underlying face rather than the stupid guidelines, and there is no obvious documentation (that I have found) telling me how to do this. So I decide that, instead, I'll just center that face at the origin and use the axes instead. Oops, same problem; the Rotate tool wants to select the axis or axes rather than the underlying face.
I realize this is a total n00b problem, and the solution has to be plainly obvious. Anyone care to point it out to me? Thanks in advance.