2019.1

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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, you can also use the arrow keys to move within the code without
affecting the selected code. You must select the Enable selection option to use the
Persistent blocks option.
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