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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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Cursor beyond EOL: Select to make it possible to position the pointer beyond the end of
the line. Clear to prevent this.
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Keep trailing blanks: Select to preserve any blank spaces occurring at the end of a line.
Clear to remove those blank spaces.
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Persistent blocks: Select to have any text you enter immediately after selecting a block of
code appended to that block of code as part of the selection. When you select this option,
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