(Emacs) Text is read only?

Question

So I was working in emacs and the suddenly, the slime-repl sbcl says text is read only. Well that\'s great because now I can\'t type anything into it. How do I fix?

Answer 1

The keyboard shortcut C-x C-q is the default binding for read-only-mode, which can be enabled or disabled with that shortcut. Describing that keyboard shortcut sequence with C-h k C-x C-q yields the following buffer printout:

C-x C-q runs the command read-only-mode, which is an interactive
compiled Lisp function in `simple.el'.

It is bound to C-x C-q.

(read-only-mode &optional ARG)

Change whether the current buffer is read-only.
With prefix argument ARG, make the buffer read-only if ARG is
positive, otherwise make it writable.  If buffer is read-only
and `view-read-only' is non-nil, enter view mode.

Do not call this from a Lisp program unless you really intend to
do the same thing as the C-x C-q command, including
possibly enabling or disabling View mode.  Also, note that this
command works by setting the variable `buffer-read-only', which
does not affect read-only regions caused by text properties.  To
ignore read-only status in a Lisp program (whether due to text
properties or buffer state), bind `inhibit-read-only' temporarily
to a non-nil value.

So, another way to call that option would be to use: M-x read-only-mode RET