This tutorial explains how to enable the Direct Access feature of your Samsung Galaxy S6. This feature allows you to assign a triple-click action to the Home key of your smartphone to gain direct access to the accessibility features of your selection. Follow the below procedure to enable and configure Direct Access:
From the Home screen, go to Settings > Personal > Accessibility.
Go to More Settings > Direct Access:
Toggle Direct access on and select the accessibility settings that you want to access using this feature: