The layout process consists of the following stages:

1. Place all items for which dialog_item<-auto_align in a two-dimensional grid.
2. Automatically align labels and values of items placed above each other depending on dialog_item<-auto_label_align, dialog_item<-label_width, dialog_item<-auto_value_align and dialog_item<-value_width
3. Items that have dialog_item<-alignment not column, but one of left, center or right are not horizontally with items above or below them, but combined with items to their left and right into sequences of items with the same alignment. At the end of the layout process aligned such sequences are aligned in the available space. Notably button objects have dialog_item<-alignment, so a row of buttons is normally centered in the dialog window.
4. Compute the cell-size of the matrix and align the dialog_item<-reference in the two-dimensional grid.

   See also

   - dialog_item-placed
   - dialog_item-left
   - dialog_item-label_width
   - dialog_item-below
   - dialog_item-auto_value_align
   - dialog_item-auto_label_align
   - dialog_item-align_in_column
   - dialog_item-above
   - dialog->_compute_desired_size
   - dialog->append
   - dialog-gap
   - class dialog_item