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Reference
Keyboard Shortcuts
Entering 2D Expressions
Introduction
Moving through Expressions
Moving the cursor by typing
You can use the keyboard to move the cursor forward or backward one character or one word at a time. You can also delete the character or word to the right or the left of the cursor, and you can move the cursor to the beginning or end of a line.
Getting out of an expression
Move to the end of the next-higher subexpression by pressing the CONTROL key and the SPACE bar at the same time.
Press 
Move out of the 
subexpression by pressing the CONTROL key and the SPACE bar at the same time.
Press
Move out of the 
subexpression by pressing the CONTROL key and the SPACE bar at the same time.
Press
Move out of the expression by pressing the CONTROL key and the SPACE bar at the same time.
Press
Selecting the next placeholder
Select the next placeholder by pressing the TAB key.
Select the next placeholder by pressing the TAB key.
Press 
Select the next placeholder by pressing the TAB key.
Press
Select the next placeholder by pressing the TAB key.
Press
Continue in this manner to select any of the placeholders in the matrix.
You can also select the previous placeholder by pressing the SHIFT key and the TAB key at the same time.
Select the previous placeholder by pressing the SHIFT key and the TAB key at the same time.
Press 
Select the previous placeholder by pressing the SHIFT key and the TAB key at the same time.
Press
Select the previous placeholder by pressing the SHIFT key and the TAB key at the same time.
Press
Continue in this manner to select any of the placeholders in the matrix.
Switching positions
Move back and forth between complementary positions by pressing the CONTROL key and the 5 key (or the % key) at the same time.
First alternate between a radicand and an index.
Press 
%
Press %
Alternate between a superscript and a subscript.
Press %
Press %
Alternate between an overscript and an underscript.
Press %
Press %
