1) Why in Debussy's Arabesque No. 1 the first two measures written without the rests? What's the rule?
2) If I write notes in different clefs and beam them together, what clef will they belong to? I mean, in programs that I used (such as Musescore and Sibelius), you cannot do this. Still, you can write notes in one clef, beam them, and send some of them to another clef, and this is the only way you can do cross-staff beaming. But the problem is if, for example, I input the notes in the Bass clef (let's say G2-Bb2-D3-G4) beam them and then send G4 to a Treble clef, the notes are beamed and look how I want. However, that G4 that I sent still belongs to the Bass clef and the programs add unnecessary rests from both sides. How to deal with it?