This article applies to PRTG Network Monitor 12 or later
Set Marker Size
We have tried to find a good balance between smaller markers (i.e. more marker visible) and larger markers (i.e., status is better visible).
You can change the size yourself by adding a little CSS code.
For PRTG version 12, add the code to the file customerstyle.css in the \website\css subfolder of your PRTG installation.
As of PRTG version 13.2 or later, add the code to the file styles_custom.css in the \webroot\css subfolder of your PRTG installation.
Use the following code for smaller markers: