Starting Edwin - MIT/GNU Scheme 7.7.90+
Description: MIT/GNU Scheme 7.7.90+

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### 7.1 Starting Edwin

To use Edwin, start Scheme with the following command-line options:

         scheme --edwin --edit

Alternatively, you can load Edwin by giving the `--edwin` command-line option and then calling the procedure `edit`:

— procedure+: edit
— procedure+: edwin

> Enter the Edwin text editor. If entering for the first time, the editor is initialized (by calling `create-editor` with no arguments). Otherwise, the previously-initialized editor is reentered.

> The procedure `edwin` is an alias for `edit`.

— variable+: inhibit-editor-init-file?

> When Edwin is first initialized, it loads your init file (called `~/.edwin` under unix, `edwin.ini` on PCs) if you have one. If the Scheme variable `inhibit-editor-init-file?` is true, however, your init file will not be loaded even if it exists. By default, this variable is false.

> Note that you can set this variable in your Scheme init file (see Customizing Scheme).

— procedure+: create-editor arg ...

> Initializes Edwin, or reinitializes it if already initialized. `create-editor` is normally invoked automatically by `edit`.

> If no args are given, the value of `create-editor-args` is used instead. In other words, the following are equivalent:

>               (create-editor)
>               (apply create-editor create-editor-args)

> On the other hand, if args are given, they are used to update `create-editor-args`, making the following equivalent:

>               (apply create-editor args)
>               (begin (set! create-editor-args args) (create-editor))

— variable+: create-editor-args

> This variable controls the initialization of Edwin. The following values are defined:

> `(#f)`
>   This is the default. Creates a window of some default size, and uses that window as Edwin's main window. Under unix, if X11 is not available or if the `DISPLAY` environment variable is undefined, Edwin will run on Scheme's console.
> `(x)`
>   Unix only. Creates an X window and uses it as Edwin's main window. This requires the `DISPLAY` environment variable to have been set to the appropriate value before Scheme was started.
> `(x` geometry`)`
>   Unix only. Like ``(x)`' except that geometry specifies the window's geometry in the usual way. Geometry must be a character string whose contents is an X geometry specification.
> `(console)`
>   Unix only. Causes Edwin to run on Scheme's console, or in unix terminology, the standard input and output. If the console is not a terminal device, or is not powerful enough to run Edwin, an error will be signalled at initialization time.
> `(win32)`
>   Windows only. Creates a window and uses it as Edwin's main window.