MicroStation-Based Geometry Editing
By default, many of MicroStation's edit tools are found as the top-most entry of the Task Navigator:
In this task list, two sub-lists contain the most relevant tools when editing feature geometry: Modify and Manipulate.
The Manipulate task list (listed at 3 in the task list above) contains tools to copy, modify, scale, rotate, mirror, etc. feature geometry:
Manipulate tools apply to all types of feature geometry: point, line, and polygon.
The Modify task list (listed at 7 in the task list above) contains tools to modify, extend, trim feature geometry, and modify feature geometry vertexes:
Modify tools are typically applied to linear and polygon feature geometry.