Render History AutoSave? Is it possible for Blender to autosave each render into the Slots in the Render View Window? 

Is this possible? Maybe an Addon is available? I also use VRay in 3ds max and it has a frame buffer which is really good for this - it helps massively when doing lookdev.

Thanks,
N
No, you have to change slots every time you render (shortcut keys 1 to 9 on the upper keyboard numbers).