Direct customer feedback copying here:
The I and O icons are a little small though. Different colors would make them easier to tell apart.
Note: Making the icons larger is somewhat difficult. Notice once the icon is selected it's right border is almost across the line:

We can either incorporate different colors or make the icons larger and move them to a separate column next to the line number.
Direct customer feedback copying here:
Note: Making the icons larger is somewhat difficult. Notice once the icon is selected it's right border is almost across the line:

We can either incorporate different colors or make the icons larger and move them to a separate column next to the line number.