Application management : Configuration : Layouts : Layouts : Field descriptions : Detail panel fields
Detail panel fields
On the Details panel, a number of settings are available that allow you to
Field
Description
Read-only
If this switch is green, the layout is read-only (the Cancel & Save buttons disappear from the Layout panel). To make the layout editable, simply click the switch again.
General
Name
Displays the name of the selected layout.
Questionnaire tab appearance
In future, this field enables you to determine whether a questionnaire is displayed inline or on a separate tab. Currently, this field is set to Visible.
Layout usage
Default layout
Click Yes to make a layout the default layout.
You can only define one layout as a default layout. Once a layout is defined as Default layout, the field will automatically be set to No for all other layouts in the business object.
For use in pop-up
Click Yes if you want to use the layout in a pop-up.
Each business object has its own pop-up.
* 
If you are configuring a reference pop-up, make required settings for the Max. no. of BOs shown and Show BOs initially fields. These fields enable you to configure how business objects are displayed in a pop-up.
For more information on pop-up "behavior", see Pop-up settings.
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If, you want to enforce that a layout is always used as the layout for pop-ups, you need to indicate this by setting the Always use pop-up layout for info pop-ups setting in General setting fields . By doing so, this layout will always be used for pop-ups for the corresponding business object.
Two-column layout?
Allows you to optimize the display of data panels within a TSI by organizing fields into two parallel columns.
This layout is designed to improve readability and scanability on wide screens by placing field labels directly above their corresponding input fields.
When the screen size is reduced, the layout automatically reverts to a single column to maintain usability.
Max. no. of BOs shown
Click to set a maximum value for the number of business objects to be shown.
Show BOs initially
Click to specify whether business objects are to be shown initially when opening a pop-up.