To whom it should concern

I am working on some docking structures.

Previously I used to have Quimera version 1.7  installed in my computer. Recently I downloaded the version 1.8 but I am having problems identifying the amino acids that are in contact with my compound using the cursor. This function is inactivated. Furthermore if I hold the key Ctrl for selecting them and labeling it is also not doing it at all.

Any help with this issue will be greatly appreciated.

Mireya Gonzalez