I’m attaching an image generated with Chimera for easy reference.

The image was generated using the following commands

colordef transblue 0 0 1 .2
color transblue,r :1-125

I’m looking for ways to remove the ribbon black outline which somehow I generated inadvertently. 

I’m also looking for ways to either (a) change the color of the grid lines or (b) the density of grid lines 

Any help would be greatly appreciated

Regards

George