Now, I have edited my code. This is what the CSS looks like in ui5-customization-m.Tree.css: And this is what the Tree looks like in the sample app: Did you like this tip? Materials. How do I connect these two faces together? We placed the accordion icon to the right of its associated label, close to the edge of the screen and right aligned. To ensure that the frameworks CSS for the ui.tree.TreeTable control is loaded before our custom CSS, simply include the sap.ui.table library in the data-sap-ui-libs property of the