I have worked with the Cerner Blood Bank module for many years and there is a ton of flexibility and functionality. As Byfaith noted, worksheet tabs in Result Entry are extremely useful. Since you're in the build phase, something else that might help is to be aware of the length/name of each DTA. The longer the name of the DTA, the wider the column in Result Entry, and the less you'll be able to see horizontally without scrolling. For example, with the ABORH, if you name your DTA's Anti-A, Anti-B, Anti-D, A cells, etc., it will take up a lot more real estate than naming them A, B, D, a, etc. Hope this helps!