‘Call it a day’ means to stop work for the day.
The electricity wasn’t working so we decided to call it a day.
Why don’t we call it a day and come back fresh tomorrow?
‘Call the dogs off’ means to stop attacking someone.
I don’t want to fight with you any more. I’m calling the dogs off.
Call your dogs off or else I will get really angry.
‘Call the tune’ means that you decide.
He is paying so he calls the tune.
In the present financial market, the banks call the tune.
‘Call the shots’ means the same thing.
I could manage this. I am used to calling the shots.
They both want to call the shots. There have been lots of arguments.