Usually when I make a beatmap, there are different colored lines. Suddenly they've disappeared and I am left with only the white lines. I need the other ones to get every beat, so how do I get the other lines back? sigh
At the top right there's the "Beat Snap Divisor" bar. If it's set to 1/1, only white lines will be visible (so change it to fit the song, usually 1/4).