Preferences

The preferences are stored in a user-specific directory when possible:

• Under X Windows, preferences are stored in ``.mred.prefs'' in the user's home directory.
• Under Windows, if the HOMEDRIVE and HOMEPATH environment variables are defined, preferences are stored in ``%HOMEDRIVE%\%HOMEPATH%\mred.pre'', otherwise preferences are stored in ``mred.pre'' in the directory contqining the MrEd binary.
• Under MacOS, preferences are stored in ``MrEd Preferences'' in the preferences folder.

There are several different panels in the preferences dialog. Each is listed below, along with a description of which configuration options each has.

• General
  • Highlight between matching parens If this is checked, the region between matching parenthesis is marked, either with a gray background (in color) or a stipple pattern (in monochrome).
  • Correct parens If this is checked, as a closing parenthesis is typed, it will be corrected to match its opening parenthesis.
  • Flash paren match If this is checked, typing a closing paren causes the corresponding opening paren to flash briefly.
  • Auto-save files If this is checked, autosave files will be created for files that have not been saved for five minutes.
  • Map delete to backspace If this is checked, the delete key does a backspace operation.
  • Use platform-specific file dialogs If this is checked, the file dialogs for open, Save, and Save As... will be the platform specific dialogs, implemented by the GUI on the platform DrScheme is running on. If not, the dialogs provided by MrEd are used.
  • Verify exit If checked, a dialog will prompt the user before he exits, ensuring he wants to exit.
  • Ask before changing save format If this is checked, and a file with images is being saved, DrScheme will prompt the user to be sure he wants to save in a non-text format.
  • Wordwrap editor buffers If checked, wordwrapping is turned on. This preference only takes for new frames, it does not change old ones
  • Show status line If checked, each frame will have a status line showing the state of the file being edited.
  • Count line and column numbers from one If checked, the status line's line and column counter will count from one. Otherwise, it will count from zero.
  • Enable keybindings in menus If checked, some menus have keybindings in them. If not, those keybindings will not appear (and of course, will not work). This preference only takes for new frames, it does not change old ones
  • Automatically print to postscript file If checked, DrScheme will print directly to a postscript file, rather than using the standard printer dialog. This is only available under Windows and MacOS.
• Default Fonts

  These control the default fonts that DrScheme uses in various aspects of it's display. These correspond to the font families found in the MrEd Toolbox Manual. DrScheme uses the Modern font for editing Scheme code, and the Default font for editing other files.

• Indenting

  This controls how DrScheme's automatic indenting is parameterized.

• General II
  • Keep execution history in interactions buffer If this is checked, interactions from previous executions are visible in the interactions buffer. Otherwise, they are cleared out on each execution.
  • Only warn once when executions and interactions are not synchronized When checked, DrScheme warns the user after the first interaction where the interactions window does not match the definitions window. If it is not checked, the warning appears after each interaction.
  • Open all files as Scheme programs When checked, all files are opened in a definitions window, and have an interactions window below. If it is not checked, only files that end with .ss, .scm, or .sch will have an interactions window.
  • Interactions window always active

    If this preference is off, only the first DrScheme window will have an active interactions window, and only if there is no file in it. If this preference is on, all DrScheme windows will have an active interactions window. If the interactions window is not active, DrScheme windows will open faster.

    Note that the interactions window will become active after the execute button is clicked, in all cases.

• Check Syntax

  This controls the font and color changes that Check Syntax uses.