PyCharm Community 2019.1
Unlike many popular text/programming editors and IDE’s, PyCharm doesn’t by default let you change the font size by pressing Ctrl + Scrolling the mouse wheel.
To enable scroll-zoom in PyCharm:
- Go to File > Settings to open the Settings dialog
- In the Settings dialog, navigate to Editor > General
- Check the Change font size (Zoom) with Ctrl + Mouse Wheel option.