2021.1

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Editor
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Auto indent mode: Select to automatically position the insertion pointer under the
first non-blank character of the preceding line when you press ENTER.
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Insert mode: Select to use Insert mode and clear to use Overwrite mode. In Insert
mode, when you enter text, existing text shifts to accommodate it. In Overwrite
mode, text you enter overwrites existing text. You can also press INSERT to toggle
between the two modes.
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Use tab character: Select to use the tab character instead of spaces to represent
tabs in the program file. Clear to use spaces to represent tabs. You must clear the
Smart tab option to use this option.
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Smart tab: Select to use smart tabs. A smart tab advances with reference to the
preceding line. It advances to align with the first non-blank character it encounters
on the preceding line, from its current position forward. You must clear the Use tab
character option to use Smart tabs.
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Optimal fill: Select to optimize the indent of every auto-indented line by minimizing
the number of space and/or tab characters it uses. You must select both Auto indent
mode and use tab character to use this option.
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Backspace unindents: Select to move the insertion pointer to the previous
indentation level when you press BACKSPACE. This is useful when you enter a
block of code such as a for loop; you enter the for statement, advance one
indentation level to enter the body of the for loop, then press BACKSPACE to enter
the end for statement. You must select Auto indent mode to use this option.
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Cursor through tabs: Select to move one by one through the spaces of tabs using
the left or right arrow keys. Clear to have the arrow keys treat the tab as a single
character. You must select Use tab character to use this option.
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Group undo: Select to set the undo feature of the Editor to undo the last group of
editing commands entered. An editing command is defined as a mouse click, a
press on ENTER, or a press on any other key. A group of editing commands is a
sequence of a single type of editing command. Clear to set the undo feature to undo
only the last command entered.
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Cursor beyond EOF: Select to make it possible to position the pointer beyond the
end of the program file. Clear to prevent this. If you clear Insert mode and select
Cursor beyond EOF, you can only overwrite the existing lines of the program; you
cannot add lines to it.
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