Solution and the solution alpha are pretty similiar with the alpha having a few more functions.
SO use the alpha manual for your solution but keep in mind the contacts are renamed. In effect the MEM/On is the same as COM, MEM is the same as TIME/MODE, and ON is the same as PLAN/ON. While the names have changed the contacts are in the same relative place from solution to solution alpha.
Therefore to activate touch the mem/on and on contacts. To access the PROfile, LOGbook, HIStory, ALTitude, or DiveSimuLator modes touch the mem/on and mem contacts until your desired selection comes up. Solution does not have a set mode like the alpha as it does not have a calendar/clock function. There will be a few other differences too but the overall funtioning is the same.