### 3.2.6 Top 20 Emacs commands

Here is a list of the 20 probably most useful commands when using the SINGULAR Emacs interface.

Starting and stopping of SINGULAR:

- `singular` (menu `Singular->Start Default...`): starts SINGULAR using default arguments.

- `singular-other` (menu `Singular->Start`): starts SINGULAR asking for several arguments in the minibuffer area.

- `singular-exit` (key `C-c $` or menu `Singular->Exit`): kills the SINGULAR process running in the current buffer (but does not kill the buffer).

- `singular-restart` (key `C-c C-r` or menu `Singular->Restart`): kills the SINGULAR process running in the current buffer and starts a new SINGULAR process with exactly the same arguments as before.

Editing input and output:

- `singular-beginning-of-line` (key `C-a`): moves point to beginning of line, then skips past the SINGULAR prompt, if any.

- `singular-toggle-truncate-lines` (key `C-c C-t` or menu `Commands->Truncate lines`): toggles whether long lines should be truncated or not. If lines are not truncated, the commands `singular-scroll-left` and `singular-scroll-right` are useful to scroll left and right, resp.

- `singular-dynamic-complete` (key `TAB`): performs context specific completion. If point is inside a string, file name completion is done. If point is at the end of a help command (i.e., `help` or `?`), completion on SINGULAR help topics is done. If point is at the end of an example command (i.e., `example`), completion is done on SINGULAR examples. In all other cases, completion on SINGULAR commands is done.

- `singular-folding-toggle-fold-latest-output` (key `C-c C-o` or menu `Commands->Fold/ Unfold Latest Output`): toggles folding of the latest output section. If your last SINGULAR command produced a huge output, simply type `C-c C-o` and it will be replaced by a single line.

- `singular-folding-toggle-fold-at-point` (key `C-c C-f` or menu `Commands->Fold/Unfold At Point`): toggles folding of the section the point currently is in.

- `singular-folding-fold-all-output` (menu `Commands->Fold All Output`): folds all SINGULAR output, replacing each output section by a single line.

- `singular-folding-unfold-all-output` (menu `Commands->Unfold All Output`): unfolds all SINGULAR output sections showing their true contents.

Loading of files and SINGULAR demo mode:

- `singular-load-library` (key `C-c C-l` or menu `Commands->Libraries->other...`): asks for a standard library name or a library file in the minibuffer (hit `TAB` for completion) and loads the library into SINGULAR. The submenu `Libraries` of the `Commands` menu also provides a separate menu item for each standard library.

- `singular-load-file` (key `C-c <` or menu `Commands->Load File...`): asks for a file name in the minibuffer (which is expanded using `expand-file-name` if given a prefix argument) and loads the file into SINGULAR.

- `singular-demo-load` (key `C-c C-d` or menu `Commands->Load Demo...`): asks for a file name of a SINGULAR demo file in the minibuffer area (hit `SPACE` for completion) and enters the SINGULAR demo mode showing the first chunk of the demo.

- `singular-demo-exit` (menu `Commands->Exit Demo`): exits from SINGULAR demo mode and cleans up everything that is left from the demo.

Help and Customization:

- `singular-help` (key `C-h C-s` or menu `Singular->Singular Help`): asks for a SINGULAR help topic in the minibuffer (hit `TAB` for completion) and shows the help text in a separate buffer.

- `singular-example` (key `C-c C-e` or menu `Singular->Singular Example`): asks for a SINGULAR command in the minibuffer (hit `TAB` for completion) and executes the example of this command in the current SINGULAR buffer.

- `customize-group` (menu `Singular->Preferences`): enters the customization group of the SINGULAR Emacs interface. (If called via `M-x customize-group` give argument `singular-interactive` in the minibuffer area.)

User manual for Singular version 4.4.1, 2025, generated by texi2html.