The layer icons in the layer table may be displayed in three different presentation styles: normal, compact, and tiny. These styles can be cycled through by pressing the small button marked with a blue dash to the left of the scroll bar under the layer table. The compact view uses smaller sample boxes and text. The tiny view uses still smaller sample boxes, and two rows.
This button is simply a means to set the value of the LayerTable variable. Variables can be set with the !set command.
The normal node is used when the LayerTable variable is unset, the other modes are used when this variable is set to ``compact'' or ``tiny''. For example, one can type
!set LayerTable compactto obtain the compact representation. Entering
!unset LayerTablereverts to the default view.