is there a way to force a syntax mode in current buffer?

[braindevices]

I have some source code with unusually postfix. How can I force the format of the buffer?

[zyedidia]

You can set the filetype option. See help options for an example of setting options based on the file extension: https://github.com/zyedidia/micro/blob/master/runtime/help/options.md#global-and-local-settings, so you would do something like "*.ext": { "filetype": "go" }.