describe usage in README

edeemer · Apr 19, 2021 · d1e00d5 · d1e00d5
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@@ -12,6 +12,14 @@ The style could be changed easily by changing -ms macro files. But due
 to the lack of some fb2 features in -ms macros (such as poems and
 epigraphs), fb2ms produces pure troff instructions for those cases.
 
+General usage:
+
+ fb2ms [-l] [file ...]
+
+If option -l is specified, then fb2ms will emit link and anchor escape
+sequences, which are extensions of Heirloom version of troff for PDF
+documents.
+
 Fb2ms does NOT support these essential features:
  1. graphical images
  2. tables