In the piano score, namely the staff, cresc means "getting stronger", dim means "getting weaker" and rit means "getting slower and slower". All belong to the speed standard in the staff.

Other common speed signs:

1, Piu Allegro turns faster.

2. Allegro Meno, slow down.

3.Piu mosso is faster.

4. gradually.

5. Accelerated rado is getting faster and faster.

6.rallentado(rall) is slowing down.

7, the original speed of a beat, slow down.

8, Tempo primo(Tempo) original speed, slow down.

Extended data:

Music score is a common notation in the world at present. Music is recorded by marking notes and other marks with different durations on five parallel horizontal lines with equal distance, which is one of the most widely used music scores.

The earliest birthplace is Greece, and its history is much earlier than the simple notation in digital form. In ancient Greece, the main form of music was vocal music. In Roman times, another symbol was used to represent pitch. This symbol is called Newham symbol.

The staff mainly serves keyboard instruments, and being familiar with the staff is the foundation for keyboard players to play well.

References:

Baidu encyclopedia-staff