In Minitab, each bar on a graph represents a category (for categorical data) or an interval (for continuous data). For example, on a histogram, by default, bars represent the frequency of observations falling within each interval (bin). On a bar chart, by default, bars represent counts or other statistics for categorical variables.

Histogram
Bar chart

To add bars when you create a graph, click Data View. To add bars to an existing graph, click the graph and choose Editor > Add > Data Display. To edit bars, select and double-click the bars that you want to edit. For more information, go to Select groups and single items on a graph.

Edit the appearance
On the Attributes tab, you can edit the fill type, fill color, line type, and line color of the selected bars.
Tip

To change the default settings for graph elements, choose Tools > Options > Graphics.

Change the y-value that the bars start at
(Not available for marginal plots) The bars start at the base position. On the Options tab, under Base Position, select Custom and enter a position. The following plots show different base positions.
Base position = 0
Base position = 10
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