This blog will show you how to have scroll bars for the customized tab.
The Initial design for an example is below:
Insert a two column tab in a form
Add a section to each column
Format each section to have 4 columns
Add fields to the columns
Save and Publish
This produces a broken form with no scroll bar:
When you open the form the columns on the left will not be visible.
Create a field that is both date and time
Add it to the first section under the row
Make it not visible by default
This fixes the problem and you will now have scroll bars for the customized tab
Dynamics CRM Team