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 # tkblt
-Derived version of the BLT Toolkit.
-Tcl/Tk 8.5/8.6 TEA compatible.
-Full support for MacOSX and Windows.
-Graph, Barchart, and Vector widgets only.
-Original author George Howlett.
+Introduction to the TkBLT library
+
+TkBLT is a library of extensions to the Tk library. It adds new
+commands and variables to the application's interpreter.
+
+TkBLT is a derived version of the BLT Toolkit by George A. Howlett,
+for Tcl/Tk 8.5/8.6, is TEA compatible, with full support for MacOSX and
+Windows, and is fully compatible with the Tk API. TkBLT is released
+under the original BSD license. TkBLT includes only the Graph and
+Barchart Tk widgets, and the Tcl Vector command.
+
+The following commands are added to the interpreter from the TkBLT library:
+
+Graph
+A 2D plotting widget. Plots two variable data in a window with an optional 
+legend and annotations. It has of several components; coordinate axes, 
+crosshairs, a legend, and a collection of elements and tags.
+
+Barchart
+A barchart widget. Plots two-variable data as rectangular bars in a 
+window. The x-coordinate values designate the position of the bar along 
+the x-axis, while the y-coordinate values designate the magnitude.
+The barchart widget has of several components; coordinate axes, 
+crosshairs, a legend, and a collection of elements and tags.
+
+Vector 
+Creates a vector of floating point values. The vector's components
+can be manipulated in three ways: through a Tcl array variable, a Tcl
+command, or the C API.