Here's a suggestion

[gzkjh]

Now when I want to add a new level in handlers, for example

{handlers, [
  {lager_file_backend,[
    {file, "xxx.log"}, {level, info}
  ]}
])

This level configuration can be 'notice' '>notice' '=<error' ...etc
But there is no way to write just 'info' and 'notice'
I suggest to modify the lager_util:config_to_levels/1

config_to_levels(Conf = [Lv|_]) when is_atom(Lv) ->
    lists:filter(fun(E)->lists:member(E,Conf) end, levels());

before this code

config_to_levels(Conf)->
    config_to_levels_int(Conf).

After this modification, I can add a level configuration like this

{handlers, [
  {lager_file_backend,[
    {file, "xxx.log"}, {level, [info,notice]}
  ]}
])

It will only record information of type 'info' and 'notice'