If you are familiar with MusicTEX but not with MIDI2TEX I suggest to
read the complete manual. If you want a quick start than switch to
section which describes all the command line options.
In this manual two types of attention marks can be found in the left margin.
The one shown left of this sentence asks your attention because
there is some important information in that sentence.
The other one, section shown left of this sentence,
refers to another section in this
manual which contains information related to the subject in that sentence.