The Text Editor Window (shown above) is the main method of viewing and editing text files in 010 Editor. Each text file that is loaded is displayed in a File Tab that shows a shortened form of the file name (the full file name can be viewed in the application title bar or in a hint popup displayed by placing the mouse cursor over the File Tab). The main area of the text editor shows the file interpreted as a series of characters (if a byte cannot be shown as a character a square symbol will be displayed). On the left side of the Text Editor Window is a list of addresses and each address indicates the line number or the file position of the first byte on the line. A Ruler, located above the main area, displays the column offset from the start of each line. The editor can be changed to display data in a number of different ways and to modify how the Text Editor Window displays data see Working with File Interfaces.

The Cursor

A cursor is shown in the Text Editor Window as a vertical, flashing line and this cursor indicates the current position for inserting, deleting, or editing data. Left-click with the mouse to move the cursor or use the cursor keys on your keyboard (see Editor Keys below). When the Text Editor Window is not active, a vertical gray line, called the shadow cursor, will indicate where the cursor was located. When the editor is in Overwrite mode (see Editing Data below) the cursor will be displayed as a thick vertical line and when the editor is in Insert mode the cursor will be displayed as a thin vertical line.

Editing Data

To edit data in the editor, position the cursor over the character to edit and type on the keyboard. The result of editing depends on whether the editor is in Insert or Overwrite mode. In Overwrite mode (OVR appears in the Status Bar) the characters typed will replace any existing characters. In Insert mode (INS appears in the Status Bar) a new character will be inserted into the file. Pressing the Delete key will delete the current character from the file.

After any edits are made a '*' character will appear in the File Tab to indicate that the file has been modified. Also, if bytes have been inserted a '*' character will appear by the file size in the Status Bar. Use the 'Edit > Undo' and 'Edit > Redo' menu options to undo or redo any modifications made to the file. The file can also be edited using the clipboard (see Using the Clipboard).

Editor Keys

The following keys can be used while editing a text file:

• Left, Right, Up, Down - move the cursor in any direction.
• Ctrl+Left, Ctrl+Right - move the cursor to the next or last word
• Ctrl+Up, Ctrl+Down - scroll the editor up or down without moving the cursor.
• Enter - insert a new line.
• Home - move the cursor to the first character on a line.
• End - move the cursor to the last character on a line.
• Ctrl+Home - move the cursor to the top of the file.
• Ctrl+End - move the cursor to the end of the file.
• Insert - toggle Insert and Overwrite mode.
• Delete - deletes the current character from the file.
• Tab - inserts a tab character or indents a blocks of lines if more that one line is selected at a time.
• Shift+Tab - if more than one line is selected, this option unindents the selected lines.

Right-Click Menu

Right-clicking on the Text Editor Window displays a popup-menu of options. This menu is a sub-set of the Edit Menu and see the Edit Menu help topic for more information on each menu option.

Splitting the Text Editor Window

The Text Editor Window may be split into two different areas by clicking the small button above the horizontal scroll bar (see the diagram above) and dragging the mouse down. Once the mouse is released the window will be split into a top and a bottom region (see the diagram below). Having two different regions is useful for editing two different areas of the file at the same time. The areas may be resized by moving the mouse over the line between the areas and dragging the line up or down (the mouse cursor will appear as an up-down arrow). Double-click on the dividing line to return to having a single area. Alternately, the Text Editor Window may be split or un-split using the 'Window > Split Window' menu option.

Editor Options

The Editor Options and Text Editor Options dialogs can be used to control a number of options for the Text Editor Window.