subtle

Per default subtle uses the numpad, because it's easier to remind the different postions when you can see them. Generally this is just a suggestion, it's up to you to change the grabs to your needs - any keys will work.

Keys that also have proven to work well are q-w-e, a-s-d and y-x-c:

Numbers: on /off 1 grab "W-q", [ :top_left,     :top_left66,     :top_left33     ]
 2 grab "W-w", [ :top,          :top66,          :top33          ]
 3 grab "W-e", [ :top_right,    :top_right66,    :top_right33    ]
 4 grab "W-a", [ :left,         :left66,         :left33         ]
 5 grab "W-s", [ :center,       :center66,       :center33       ]
 6 grab "W-d", [ :right,        :right66,        :right33        ]
 7 
 8 # QWERTZ
 9 grab "W-y", [ :bottom_left,  :bottom_left66,  :bottom_left33  ]
10 
11 # QWERTY
12 grab "W-z", [ :bottom_left,  :bottom_left66,  :bottom_left33  ]
13 
14 grab "W-x", [ :bottom,       :bottom66,       :bottom33       ]
15 grab "W-c", [ :bottom_right, :bottom_right66, :bottom_right33 ]

You can find more about assigning keys here.