You need to understand the directions of the axes
To correctly move the objects that make up a larger object (arms, legs, etc.) you must know the direction of each of the axes belonging to the object.
Often, those axes are difficult to see.
Sometimes you can't see any of the axes without making the object invisible.
Sometimes you can see one, but in order to see two or more, you must make the object invisible.
Sometimes you can see two, but not all three, and sometime you can see all three.
For the case where you can see any two of the three axes, you can always figure out what the direction of the missing third axis is.