I dragged file#1 and threw it to the left corner of main monitor, file#3 and file#4 to the left and right of the external monitor. All of them automatically stretched into 50% and into the corners by themselves.
But I could not do that with file#2. Can you please teach me how to do ?
And is it possible to open all those 4 files in only the external monitor with automatic 25% stretching?