Many functions accept an Attribute ID as an argument. The Insert Attribute ID button allows you to locate the relevant attribute through a browse / search dialog instead of manually entering the ID. This helps to ensure that the correct item is being used in the function by limiting user error.
Important: When referencing attributes and/or units in the Value Template or the Function Editor, always use the ID (not the name) to precisely locate the appropriate attribute or unit.
To display the attribute selector dialog, click the Insert Attribute ID button or right-click and select the option from the menu. Use browse or search to select the attribute. The Attribute ID is inserted at the cursor position.
You may also perform some advanced search operations to find the right attribute, or use wildcards in searches. Refer to the Navigating and Searching section in the Getting Started documentation here.