# Editing TCL commands

The TCL editor uses the Update processor to enter commands,
so the TCL editor commands are similar to the Update processor commands.
A TCL command may be created and edited as if it were a paragraph.
Pressing CTRL+M or Enter within the TCL command processes the entry.

The TCL editor is initially in the overtype mode. To toggle
between overtype and insert mode, press CTRL+R. The following commands
function the same in the TCL editor as they do in the Update processor.

| CTRL+ B | Moves cursor up one line. |
| --- | --- |
| CTRL+ E | Deletes to end of sentence (command). |
| CTRL+ G | Moves cursor to end of sentence (command). |
| CTRL+ H | Backspace and replaces character with space. |
| CTRL+ I | Goes to next tab position on line. |
| CTRL+ J | Moves cursor left. |
| CTRL+ K | Moves cursor right. |
| CTRL+ L | Deletes character. |
| CTRL+ M | Insert mode. Processes the entry when the cursor is at the end of a line; inserts a carriage return/line feed (CR/LF) when the cursor is within the line. |
| CTRL+ N | Moves cursor down one line. |
| CTRL+ O | Deletes from cursor to end of word. |
| CTRL+ R | Toggles between overtype and insert modes. |
| CTRL+ T | Moves cursor to beginning of command. |
| CTRL+ U | Moves cursor to next word. |
| CTRL+ W | Inserts single space. |
| CTRL+ X | Exits TCL command and leaves just the TCL prompt. |
| CTRL+ Y | Moves cursor back one word. |
| CTRL+ ZZ | Undo last delete. |

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Source: https://d3codex.com/tcl/editing-tcl-commands/ - part of the D3Codex reference.