In MicroStation V8i Select Series 1 the trim tools as you know them have been renamed and enhanced to become more productive for the user.
Trim To Intersection
Old name Extend Two Elements to Intersection
Enhancement: this tool will allow you trim or extend elements of any type. This includes complex chains which was a limitation before.
Trim To Element
Old name Extend Element to Intersection
Enhancement: new tool setting to allow the user to select the cutting element first. Only if you have used AutoCAD before will you know why.
Old name Trim Element
Enhancement: new tool setting to allow the user to select the Mode to either Trim or Extend or Both. Holding down the Control Key will allow the user to select multiple elements