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# General

LINK's graphical user interface (GUI) has been written in such a way that extensions and changes are much easier than would be possible with an XWindows application. Erick Gallesio's object-oriented Scheme interface (STk) [6] to John Ousterhout's Tk graphics package [11] makes this possible. It is not necessary to know any further details of these packages in order to use LINK effectively, but the LINK User's Manual (see Page describes how to make effective use of some power features of the system. For example, it is possible to program series of computations such as groups of experiments, and systematic evaluation and/or setting of attributes by writing very small Scheme programs.

The GUI is intended to be usable without documentation. However, we will briefly describe its features below. In our descriptions, we will use the following notation to describe events:

Notation | Expanation
Main Window | The small window that comes up when LINK is run
Graph View | A window in which graphs can be drawn.
Graph Menu | The menu at the top of a graph window.
Menu-option | Select option from Menu
Menu1-Menu2-option | Selecte the Menu2 option from
| Menu1, then select option
| from Menu2.
| and so on.
<1st> | Click with the first (leftmost) mouse button
<2nd> | Click with the second (middle) mouse button
<3rd> | Click with the third (rightmost) mouse button
<Shift-1st> | Click the first mouse button while holding the shift key down

Next: Graph Creation, Copying, and Up: Graphical User Interface Previous: Graphical User Interface