Using this dialog you can edit a field of Formatted Type with Smart Edit Control. Formatted Type fields are areas in Advanced Installer where you can refer to a folder, file, property or environment variable only by its reference (generated automatically when you pick the folder/file/property/variable). This reference will expand during the installation to the full path of the selected folder/file or value of the correspondent property/environment variable.
The helper buttons allow you to insert references to files in the package, folders, and properties. The references will be inserted at the cursor position in the Formatted edit field. Depending on the field's usage (default installation path, command-line for a custom action or target for a scheduled task) you can insert a reference to a:
To remove references you can delete the string from the field. Be careful to remove both matching square brackets and everything in between.