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Visio - Format Connectors
Format arrow styles, line weights, and color choices to alter the look of connectors.
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Change the look of a connector quickly
Select a connector.
Select Home > Quick Styles.
Select a style you want.
Format a connector
Select Home > More.
Select a connector.
From the Quick Styles menu, select Line and then format what you want:
Select Color and choose a color for your line.
Select Width to make the line thinner or heavier.
Select Begin Arrow type or End Arrow type to change the look of the line endpoints.
Want more?
Add arrows, points, or other line ends to a connector in Visio