You can add more rows by pressing Enter / Return, add more indentation by pressing Space, and move between the formula by pressing the usual arrow keys. If you delete all the places of a row, then the entire row will be deleted. This is very handy you can type right away there's no need for you to move between columns. When you type a number, its digits are automatically distributed in columns at left of the cursor. You can cut, copy, and paste bits of the formula, just as you would work with text in another application. We can select text by holding down shift while we move the cursor with the arrow keys, or by clicking and dragging with the mouse. If there are times the arrow keys don't move the cursor in the direction you expected, you may click with the mouse where you want the cursor to be, or just keep pressing the right or left arrow keys until you exit the problem area. Pressing the backspace (Windows) or delete key (Mac) selects the whole fraction, instead of deleting one character if we pressed delete again, the whole fraction would be deleted. Continued typing from this point will be outside the fraction. Note the change of size of both the horizontal and vertical cursors, indicating it is affecting the whole fraction. Pressing the right arrow key moves the cursor outside the fraction. Pressing the down arrow key moves the cursor to the denominator However, pressing again the left arrow key moves the cursor to the numerator, as if instead of a fraction we had two lines of text Pressing the left arrow key behaves as usual, since we move within the denominator, which is made up by text
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