You can show the arena frames by either typing this in chat or set it as a macro
Code:
/run LoadAddOn("Blizzard_ArenaUI");ArenaEnemyFrames:Show();ArenaEnemyFrame1:Show();ArenaEnemyFrame2:Show();ArenaEnemyFrame3:Show();ArenaEnemyFrame1CastingBar:Show()
As for the raid frames I'm not sure there is an easy way to do so with blizzards frames. If you're using 3rd party mods I doubt they have any test mode like many used to during the earlier wow years.