Time signature changes mess up layout and measure durations
The size signs are not deleted. More precisely, they are removed, but the dimensional structure in the entire scope collapses and turns into chaos. Logically, the size icon should be removed while preserving the tact property. For example, the nominal duration of a beat is 4/4, and the actual duration is 3/8. So, after removing the icon, it should not be distorted, filled with pause and other changes, and in the whole work. That is, by removing the sign 4/4, the actual size should remain 3/8, and neighboring bars should not be damaged.