Shows the Open File dialog.

Shows the list of recently opened files.

Prints the graph using current setup.

Shows the Print Preview dialog.

Shows the Page Setup dialog.

Reloads the current graph.

Edits the layout command or shows the list of preset layout algorithms.

Zoom in the current graph by 10%.

Zoom out the current graph by 10%.

Displays the What's This mouse pointer. Click with it on a GUI element to obtain help using it (if there is such help available).