RStudio IDE appearance problem - white line in code source editor

After i pull the R script window size and a white line appear and my script cant work properly,


My cursor is at the second line between ^ and 3 ,when i typed it is behind the 3
plz help me , i have tried reinstall rstudio,but it doesnt work

Welcome to the community!

Can you try this and let us know whether it helped or not?

The white line is the margin column. You can turn it off in Options -> Code -> Display -> uncheck Show Margin.

The cursor issue is probably because your font is delivering the wrong metrics to RStudio. Does using a different font help?