In viewing through a magnifying glass, one usually positions one's eyes very close to the lens, does angular magnification change if the eye is moved back?

Explanation

Yes, it decreases a little because the angle subtended at the eye is then slightly less than the angle subtended at the lens. The effect is negligilble if the image is at a very large distance away.
[ Note: When the eye is separated from the lens , the angles subtended at the eye by the first object and its image are not equal . ]