From the Workbench menu, select Tools > Options > Geometry Import.

For Filtering Prefixes and Suffixes, specify any keys that must appear at the beginning or end of a CAD parameter name for it to display in Workbench.

The default is ANS;DS. However, you can specify any number of prefixes or suffixes as keys. For example, to expose a CAD parameter named Length in Workbench, you could rename it to something like dslength, Lengthds, ds_Length, or Length_ds. The order, underscore, and case do not matter. All of these would be recognized as matching the key DS.