Try this:
{"keys": ["ctrl+u"], "command": "scroll_lines", "args": {"amount": 40.0}, "context": [{ "key": "setting.command_mode" }]}, {"keys": ["ctrl+d"], "command": "scroll_lines", "args": {"amount": -40.0}, "context": [{"key": "setting.command_mode"}]}
source: http://www.sublimetext.com/forum/viewtopic.php?f=2&t=2908
Customer support service by UserEcho
Try this:
{"keys": ["ctrl+u"], "command": "scroll_lines", "args": {"amount": 40.0}, "context": [{ "key": "setting.command_mode" }]}, {"keys": ["ctrl+d"], "command": "scroll_lines", "args": {"amount": -40.0}, "context": [{"key": "setting.command_mode"}]}source: http://www.sublimetext.com/forum/viewtopic.php?f=2&t=2908