ULC visual parts use box layout. (For more information about layout, see ULC layout.) The To-Do list sample can be visualized as having three basic groups:
We therefore choose a grid of a single column with three rows.
the Ulc Canvas category, select
the Box part in the right-hand column and drop it onto the Shell part.
By default, the Box has two rows and two columns, each containing a
cell. The Box part can be distinguished from the cell by the Box's
continuous blue outline; the cell has a dotted black outline.
the GroupBox part and drop it into the first row. By default, a
cell's content is horizontally left-aligned and vertically
centered.
another GroupBox part and drop it into the second row.