I hope this question is not too broad. It is inspired by another question.
We know that ISS keeps its nadir pointing to Earth's surface.
What about other manned spacecraft?
Do/did they have distinct modes of attitude to Earth? What were motivations of spacecraft attitudes? I couldn't find info for most of historic manned spacecraft, at least now...
Skylab was keeping orientation to maximize insolation of fixed solar panels.
Did Mir, Salyut space stations do the same as Skylab? (I suppose yes but have no proof)
Did Mercury, Gemini craft have attitude requirements relative to Earth?
Did Apollo have attitude requirements relative to Earth in different phases of missions? (I know at least in lunar transfer it was spin-stabilised)
According to ESA site Soyuz spacecraft are spin-stabilised during long 2-day flights, with rotation axis perpendicular to sunlight to maximize insolation of solar panels. During short 6-hour flights Soyuzes are not spin-stabilised. But there is no info what is attitude mode in the short-flight case.
Did Space Shuttle have attitude requirements relative to Earth?