Code space shows a vertical line

Hi, i have a laptop that's new and up to date hardwarewise and softwarewise, however after installing Rstudio and when I open a new R page to start coding I get a horizontal line, I tried pyCharm ( there is a module that supports R code ) I get the same thing, in other languages everything seems to be good. Can you enlighten me ?

Looks good to me. What do you expect?

Is that the separator line for the console panel.
Can you shift it upwards with the mouse?
Can you resize the edit panel?

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The line shows 80 characters in your source script:

There is a vertical line in the script editor indicating the 80th character, many people will use this as a guide to new line their code so that it will be easy to read.

why there is a horizontal line in there ?

You are seeing the margin column. You can turn it off in Tools -> Global Options -> Code -> Display -> uncheck Show margin.