It is possible to increase the mark associated with the value. Since it is very small. I have searched the parameter and I have not managed to increase its size
You can enable custom API in the Advanced editor section.
Click on Advanced Editor (yellow icon) –> Go to Custom API tab –> Choose Custom template and try pasting the following code snippet and check if it helps.
You can change the radius based on your requirement. Hope this helps.
Can you share the image again as I am not able to see anything other than text in your question?