-You can export Hooke curves as images and as text columns. To export
-as images, issue the `export` command followed by the filename.
-Supported formats are PNG (raster) and EPS (Encapsulated Postscript,
-vectorial). The export format is determined by the filename
-extension, so `export foo.png` and `export foo.eps` will save
-PNG and EPS files respectively.
+You can export Hooke curves as images and as text columns. To export
+as images or text, use the ``export_block`` command. Supported
+formats are PNG (Portable Network Graphic, raster) and EPS
+(Encapsulated Postscript, vector). The export format is determined by
+the filename extension, so ``export_block --output foo.png``,
+``export_block --output foo.eps``, and ``export_block --output
+foo.txt`` will save PNG, EPS, and TAB-delimited text files
+respectively.