I have met problem in the use of style sheet. In using the External Evaluation of Python in Mathematica, If we choose the style sheet as "Default", pressing the "Enter" will cause a line break in the cell. However, When I changed the style sheet into "Journal Article", Pressing the "Enter" will run the python program. To let it more clear, I list the screenshot [![enter image description here]]
I also noticed that the Equation numbered in Journal articel will create new cell rather than a line break too. Any one knows how to change the behavior of pressing Enter?
The “Enter” is the "Left Enter"， not the "Right Enter" in number area. My mathematica is 12.0 and in Windows 10. : https://i.stack.imgur.com/1Dxy0.png