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Pressing the spacebar by itself does not do anything special in Excel, except enter a space. In conjunction with other keys, it does a lot more. Ctrl-Spacebar selects and column and Shift-Spacebar selects a row for example
Home keys moves the current active cells to first column of current row.
Shift - Spacebar selects the current row. Ctrl - Spacebar selects the current column. As a way of remembering which is which, think of C for column and Ctrl. Note that if more than one cell is selected when using these commands the rows or columns of the selected cells will be selected, not just the ones relating to the active cell. This also means that if you do one after the other, in any order, the entire worksheet will be selected.
No, except at the beginning of a sentence because it is not a proper noun.
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There are a few ways. If you hold the Shift key and then use any of the navigation keys, like the cursor keys or the Home key or the End key, you can select ranges. You can also use the F8 key to start and end the selection of a range, and then use the arrow keys to do the selection.
Chop and Change - the Black Keys.
<ALT> and <TAB>
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