Pressing F1 at any time activates the HELP system, which gives you on-line access to the entire text of the ORCHIS manual. The portion of the manual which appears is indexed to the current menu and the current operation. The HELP system is fully described in Chapter <[11]>.

If you press F2 at any time, the entire ORCHIS screen display will be erased and redrawn.

This command is available when you are displaying a chart. It toggles between two modes governing the display in the chart window: TOTAL (the chart image is stretched or shrunk to exactly fill the window) and PARTIAL (a portion of the chart is displayed according to position and stretch information associated with the window). F3 has no effect if you are displaying a form.

This command is available when you are displaying a chart. It first toggles out of TOTAL display if necessary, and then moves the view in the chart window so that the new center of the window is the point that was occupied by the cursor at the moment the F4 command was invoked. F3 and F4 can be used in combination to navigate rapidly about the chart. First press F3 to toggle into TOTAL display. Point with the cursor at the box in the chart you want to examine, and then press F4. ORCHIS will toggle out of TOTAL mode, and display the selected box at the center of the chart window. F4 has no effect if you are displaying a form.

Use the super-escape key, F10, to return in a single step from the current menu to the ORCHIS top menu. This command is equivalent to pressing the escape key again and again until you reach the top level menu.

The keys of the numerical key pad are used to move the cursor, to shift the view when a chart is displayed, and to move to neighboring boxes when forms are displayed. These keys have different functions when in the HELP system. See Chapter <[11]> for more information.

Pressing an arrow key in the numerical keypad moves the cursor a single step in the direction of the arrow. See <[FIG09]>.

In chart view, holding down a shift key while pressing an arrow key moves the chart display view by one half of the window size in the direction of the arrow. Thus pressing shift-right moves the chart window to the right (picture elements appear to move to the left inside the window). In form view, the shift-arrow keys move from the current box to one of its neighbors. Shift-up moves to the parent box of the current box. Shift-left and shift-right move to its sisters. Shift-down moves to the first daughter of the current box.

In chart view, holding down a shift key while pressing the Home key causes the chart display window to be re-positioned at the extreme upper left corner of the chart. Similarly, shift-PgUp moves the chart window to the upper right corner of the chart. Shift-PgDn and Shift-End move to the lower right and lower left corners respectively. See <[FIG12]>. These keys have no effect in form view.

This key enables and disables automatic cursor motion. Press the Grey-plus key followed by a cursor motion arrow key to start the cursor moving at a constant rate in the direction indicated by the arrow. Press the same cursor motion key again to accelerate the motion. Press a different cursor motion key to change the direction. Press the Grey-plus key again to stop the motion.

When you are editing a text string, a number of control key commands become available, and the command menu is replaced by a list of these. The new commands are: Ctrl-F: move text cursor forward 1 character Ctrl-B: move text cursor back 1 character Ctrl-A: move text cursor to start of line Ctrl-E: move text cursor to end of line Ctrl-K: delete from cursor to end of line