UniversalWolf: IIRC, there's a button that does that. I don't remember which key it is, so look through the keyboard input settings.
The camera rotation was activated by the patch, so in vanilla bloodlines there is no option unless you use the console.
UniversalWolf: If you're using the patch you can also use the numbers on the keypad to change the camera angle. You can also zoom in and out.
I assume that works on the GOG version, but I don't know positively because I have a different version.
With the patch you can also set the keys for camera rotation to your liking. Just open ...bloodlines/unofficial_patch/cfg/user.cfg with any text ediror and look for entries
bind *key* cam_yaw #.
cam_yaw 0 is the view from behind, and then it goes counter clockwise.