How to change the fields in a page from a two-column to one-column layout?
By default, the Create [Record] page
layout is set to 2 columns. You can customize the page layout and set
it to single column by following these steps:
1. Log in to Zoho CRM with Administrator privileges. 2. Click Setup > Customization > Modules and Fields. 3. Select the desired module and click Layout. 4. In the Layouts page, click the Settings icon. 5. Under Section Layout, select Single Column as the Column Layout.