Arrow keys not working in Excel? 5 ways to troubleshoot

If your arrow keys are not working in Excel, there are a few simple ways to troubleshoot and solve this problem.
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I Use the Arrow Keys More Than Any Other Keys in Excel

Here are the best uses of the Arrow keys in Excel with Scroll Lock mode turned on. Pressing Ctrl+Shift+Up, Down, Left, or Right Arrows selects the current cell and all cells above, below, to the left, ...