How can I change the appearance of the display screen?
Answered

This is how my display look (I'm really a beginner in Python and PyCharm as well). I really wanted to make this red area more shorter (or just remove it from the screen), and put the Tool Windows Bar on the right side of the screen.
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Hi, that line is probably a visual guide for hard wrapping. You can configure it in **Preferences | Editor | Code Style**
Also, you can move any tool window almost anywhere
Good day
how do I go about the font size I think I did something wrong with the display
You can change the interface font size in Settings/Preferences | Appearance & Behavior | Appearance and the editor font size in Settings/Preferences | Editor | Font