While the cursor is placed in the graphic-pane (cross-hair cursor), the left mouse button (#1) sets a marker and the other buttons perform certain actions each. The middle button (#2) expands the region between the marker and the border in which the cursor is positioned and the right button (#3) expands the region between the marker set with #1 and the current cursor position.
You may set a vertical marker (single click #1), a horizontal marker (double click #1) or a corner marker (triple click #1). A corner marker is a combination of a vertical and a horizontal marker and defines a corner of a rectangle. Leaving the tv-root window deletes all viewport-markers set.
With the cursor on the scales gumby-cursor
the left mouse button shifts the
displayed spectra to the left and the right button to the right.
In combination with the keys Strg Shift #1 shifts the viewport to the left, #2 centers the viewport at cursor position and #3 shifts the viewport to the right.
The configuration of the mouse buttons can be defined in your
.Xresources file (see appendix B
p. ) which will overwrite the default settings.
The x- and y-position of the cursor is displayed in the status bar
of the window the cursor is in (see 3.1
p. ). If a calibration is loaded, the x-position
is displayed both calibrated and uncalibrated (in parenthesis).