What are the black circles in eagles board layout

[ryaneastland]

Hi I'm designing up a PCB in eagle CAD at the moment and I was wondering what the black circles in the board layout mean and how to get rid of them because they are interfering with my layout I made before I realizing they were there.

e.g.


If it helps there part of the dimensions layer.

Thanks in advance

[ryaneastland]

Ok I worked it out I'm an idiot. There part of the USB connector on the board. 

[nitro2k01]

Such circles are commonly part of a drill hole. A drill hole will contain data in dimension (20), tStop/bStop (29/30) and holes (45). In the case of a hole, the actual component you can edit, delete etc is in layer 45. To complicate things, the hole may additionally reside inside a component, which makes it impossible to edit it directly, instead you need to delete the component that the hole is part of. Usually, displaying all layers will clear up the situation.

(I'm posting this even though the problem was resolved.)