Using the Keyboard with MMDISP

• Overview The keyboard can be used to interact with mmDisp both by allowing mouseless access to the menu and control bar and by providing keyboard shortcuts for common commands. The key active region is the portion of mmDisp currently accepting keyboard input. The default key active region is the display window. Pressing the tab key will cycle the key active region through the control bar with stops in order at axis, subsample, zoom and display. Pressing shift-tab cycles the key active region the opposite direction. The region of the control bar that is the key active region is outlined in black. If no region is black the key active region is the display window. Perhaps the most useful key command is the ESC key. The ESC key will undo the last command given to mmDisp and works regardless of the key active region. The ALT key allows keyboard access to the menu commands.
• Display window The display window is the default key active region. The below commands work when the display window is the key active region.
  • Subsample: The subsample factor can be changed using the insert or delete keys. Insert increases the subsample rate by one and delete decreases the subsample rate by one. Pressing shift-insert or shift-delete respectively double or halves the subsample rate.
  • Zoom: The zoom factor can be changed using the page-up or page-down key. Page-up increases the zoom factor by one and page-down decreases the zoom factor by one. Pressing shift-page-up or shift-page-down respectively double or halves the zoom factor.
  • Axis: CTRL-r rotates the axis clockwise. CTRL_SHIFT-r rotates the axis counter-clockwise.
  • Fill Display: Pressing CTRL-f will use the fill display command on the current window.
  • Wrap Display: Pressing CTRL-w will use the wrap display command on the current window.
  • Open File: Pressing CTRL-o will bring up the open file window.
  • Print: Pressing CTRL-p brings up the print window.
  • Fill&Wrap display: Pressing the HOME key will first run the fill display command and then will run the wrap display command.
• Control bar: The tab key is used to move the key active region between the control bar and the display window. Pressing the tab key repeatedly will cycle through the the control bar. Pressing shift-tab will move the active region in a direction opposite to the tab key. Any active region for a key command, aside from the default display window, will be highlighted in black. The key commands that are available will vary depending on which region is active. The functionality of the key commands is discussed for each active region.
  • Axis box When the axis box is selected with the tab key pressing the left arrow rotates the axis counter-clock-wise and pressing the right arrow key rotates the axis clockwise.
  • Subsample text box When the Subsample text box is selected with the tab key typing in the text box allows entry of a subsample value.
  • Subsample Slider When the subsample slider is selected, the subsample factor can be increased by pressing the right cursor key or decreased by pressing the left.
  • Zoom text box When the zoom text box is selected with the tab key typing in the text box allows entry of a subsample value.
  • Zoom slider When the subsample slider is selected, the subsample factor can be increased by pressing the right cursor key or decreased by pressing the left.
  • Display window The display window, the default key active window, can also be selected with the tab key. The keys that can be used with this window are detailed above.

• File Menu The file menu may be accessed by pressing the ALT key and then one the underlined letters F,V,C or H. This will open either the file, view, control or help menus. The arrow key can the be used to move among the menu items, with return selecting a highlighted choice. While the menu is open, pressing the underlined letter of the command with a command will select that command. Pressing return while a menu item is highlighted selects that menu item.

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