How do I add error bars in Excel for my chart?

I would like to use error bars in excel to demonstrate variability in my data visually. I am not certain how to make them customized to standard deviation or constant values. Require step-by-step instructions, which are compatible with the newer Excel version.
 
To add error bars in Excel:
  1. Click your chart to select it.
  2. Select Chart Design- Add Chart element-Error Bars.
  3. Select the Standard Error, Percentage or More Options as custom values.
  4. In More Options, fill in Custom and enter in your values or a range of standard deviation.
  5. Adjust when necessary and your chart would indicate the error bars.
 
To add error bars in Excel:
  1. Select your chart.
  2. Click the Chart Elements button (plus icon) next to the chart.
  3. Check Error Bars, then click the arrow to choose: Standard Error, Percentage, or Custom.
  4. For Custom, select the range of values for positive and negative error values.
 
Here’s the simple way to add and customize error bars in Excel.
  1. Click your chart to select it.
  2. Press the + icon on the right side (Chart Elements).
  3. Check Error Bars, then click the small arrow next to it.
  4. Pick Standard Error, Percentage, or Standard Deviation to add quick bars.
  5. For full control, click More Options to open the Format Error Bars pane.
  6. Under Error Amount, choose Custom → Specify Value.
  7. Select your data range for the positive and negative error values for example, the cells with your standard deviation numbers.
  8. Click OK, and the chart will show customized error bars.
 
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