How do you glue files in Trados Studio? Use Merge Files
Use the Merge Files dialog box to merge multiple files into one translatable file.
To display this dialog box, first import the files, then select them, and then click Merge Files on the Project Files page of the New Project wizard.
When files are merged, the translator sees one file. However, when SDL Trados Studio generates the translated files, they are split into the original files. You do not need to manually split them.
This is, indeed, an improved workflow compared to Trados Glue used in Trados 2007.