How to create a dimension style in MicroStation v8 and where to locate these tools.
To open the Dimension Styles tool you should go into the menu:
> Element > Dimension Styles
You should then see the Dimension Styles dialog box.
Select the "New" icon, which looks like a blank piece of paper, or select "New" from within the Style menu pull-down.
Highlight the "untitled" text and enter a new text style name.
Set up the desired settings for your dimension style which could include various items under the Geometry, Units, Text, Symbology or Advanced tabs like:
After these have been finalised click on the "Save" icon or select "Save" from the Style menu choose "Save".
Further detail can be found in the Help Documentation under:
> Help > Contents > Menus > Element Menu > Dimension Styles Dialog