When changing to lighter strings neck might bend in a backward bow. Press a string on first fret, and on the fret where neck meets body at the same time. Measure high of string over 7th fret usually(close to middle of frets pressed). A high of 0.4 millimeters or so shouldn’t be to bad. If string touches any fret middle tighten tross rod until you get it about right. After that work mostly with string overall high with bridge adjustment. Regards and Merry Christmas