Reads zettel data from a file (or from standard input / stdin) and renders it to standard output / stdout. This allows Zettelstore to render files manually. zettelstore file [-t FORMAT] [file-1 [file-2]] -t FORMAT Specifies the output format. Supported values are: html (default), md, shtml, sz, text, and zmk. file-1 Specifies the file name, where at least metadata is read. If file-2 is not given, the zettel content is also read from here. file-2 File name where the zettel content is stored. If neither file-1 nor file-2 are given, metadata and zettel content are read from standard input / stdin.