1.) Define coordinate system to DGN file
2.) Tools > Geograpics > Select Geographic Coordinate System
3.) Library > Projected > Singapore
a. Select EPSG 1414
4.) File > Save Settings
5.) Open Singapore OneMap website
6.) Scroll down to WMS Basemap Service URLs
7.) Select XML URL path (Example: http://www.onemap.sg/OneMapWMS/OneMapWMS.xml )
8.) Raster Manager > File > New > WMS
9.) Paste URL in Raster - WMS
10.) Select Map level
11.) In WMS check the fields that have a red block around them.