The following Wiki shows you how to create new cells using MicroStation v8i and CONNECT Edition.
There is a small difference between the two versions of the software.
In MicroStation v8i, the create button is on the bottom right:
In MicroStation CONNECT Edition, the Create icon is on the top left:
Video - MicroStation v8i
Video - MicroStation CONNECT Edition
How to place cells in a *.dgn file
Create cells by keyin