View > Predefined Views orients the X, Y, and Z axes of the active object into one of seven common orientations that are relative to the world coordinate system:
View > Predefined Views > Top - a view of the
XZ plane in the negative direction.
View > Predefined Views > Bottom - a view of
the XZ plane in the positive direction.
View > Predefined Views > Left - a view of the
YZ plane in the positive direction.
View > Predefined Views > Right - a view of the
YZ plane in the negative direction.
View > Predefined Views > Front - a view of the
XY plane in the negative direction.
View > Predefined Views > Back - a view of the
XY plane in the positive direction.
View > Predefined Views > Isometric - an isometric
view of the object