ORIENTATION attribute
The ORIENTATION attribute defines whether an element displays
vertically or horizontally.
Syntax
ORIENTATION[@screen-size] = {VERTICAL|HORIZONTAL}
where screen-size can
be:
{ SMALL | MEDIUM | LARGE }- screen-size is a screen size selector that indicates how the element is
oriented, vertically or horizontally, depending on the size of the screen. Several
ORIENTATION@screen-sizeattributes can be used for the same element. 
Usage
The ORIENTATION attribute defines how a form element must be oriented, when the
element can be rendered in both horizontal and vertical directions. 
The ORIENTATION attribute can be used in the definition of a
RADIOGROUP form item, to specify how radio items have to be displayed:
RADIOGROUP f001 = customer.status, ORIENTATION=HORIZONTAL;
A 
VBOX or HBOX container can be defined with the
ORIENTATION attribute, in conjunction with a
@screen-size modifier, to get the appropriate rendering,
depending on the screen size:VBOX vb1 ( ORIENTATION@LARGE = HORIZONTAL )- A 
VBOXrenders by default vertically, and the orientation can be changed to horizontal. - An 
HBOXrenders by default horizontally, and its orientation can be changed to vertical. 
Example
VBOX vb1 ( ORIENTATION@LARGE = HORIZONTAL )
GRID grid1
...
TABLE table1
...
END