Text Editor

The text editor provides a simple, full-screen way to create and modify text files. It behaves similarly to GNU nano or MS-DOS edit, with clear on-screen prompts and keyboard shortcuts.

Starting the editor

To edit an existing file:

edit filename.txt

To begin a new file:

edit

Moving around

Use the arrow keys to move the cursor up, down, left, and right.
Home jumps to the start of the current line.
End jumps to the end of the current line.
Page Up and Page Down move through the file a screen at a time.

Editing text

Simply type to insert characters at the cursor.
Enter splits the line at the cursor and moves the text to a new line.
Backspace deletes the character to the left of the cursor.
Delete removes the character under the cursor.
Lines will join together automatically if you backspace at the start of a line or delete at the end.

Saving your work

Press Ctrl+S to save.
- If the file already has a name, you’ll be asked whether to keep it.
- If it’s a new file, you’ll be prompted to enter a name.

Searching and replacing

Ctrl+W starts a search. Type the text to look for, and the editor will highlight the first match.
Ctrl+R begins search and replace.
- Type the text to search for.
- Type the replacement text.
- For each match you can choose:
  - Y – replace this one
  - N – skip
  - A – replace all
  - Q – quit replacing

Syntax highlighting

Press Ctrl+T to toggle syntax highlighting on or off.
When enabled, BASIC keywords are coloured for easier reading.
This affects only the display, not the saved file.

Exiting the editor

Press ESC to quit.
If you have unsaved changes, the editor will ask you to confirm before closing.

Quick reference

Key	Action
ESC	Exit editor
Ctrl+S	Save file
Ctrl+W	Search
Ctrl+R	Search and replace
Ctrl+T	Toggle syntax highlighting
Arrows	Move cursor
Home	Move to start of line
End	Move to end of line
PgUp	Page up
PgDn	Page down
Enter	Split line
Backspace/Delete	Remove characters