현재 시간 입력

  excel google sheet    
windows ctrl + shift + ; ctrl + shift + ;    
mac command + ; command + shift + ;    

날짜 입력

  excel google sheet
windows ctrl + ; ctrl + ;
mac ctrl + ; command + ;

column 선택

  excel google sheet
windows ctrl + space ctrl + space
mac ctrl + space ctrl + space

row 선택

  excel google sheet
windows shift + space ctrl + space
mac shift + space ctrl + space