how to view pics

hi all now the winter is here I have being searching site looking at a few mods in alot of topics i get small thumbnails of pics but cant seem to open them any ideas ta in advance

If you are on PC  you can hold cntrl and scroll up with the mouse wheel which will zoom in with your browser    or   you can right click on an image and save it to your pc  and then open it with whatever picture viewer you normally use        thats what I have done until I find a better way  haha