Wow i see what i did wrong i had to zoom out all along. now i cant figuer out how to rotate what im looking at i feel so shamed

In BrawlBox i open the pac files and the fitmotion files and i still cant find the one to preview the character model and such can someone show me like a picture by picture guide. Also if e end up findinng out how to do this how would i replace someones head with something else say like marios fireball.