This assists in building variable names for channel sets. Variable names should generally be made up of abbreviations separated by underscore characters (_). For example int_mnf_t means intake manifold temperature.
To build a name you may type into the text field on the right side. You may also select an abbreviation and click the "->" button to insert the abbreviation at the current cursor position in the text field. Or you may double-click an abbreviation to insert it.