Introduced in Indigo Figs Zone Stamp 24 version 1.01
Zone Size is the dimension of a rectangular zone presented as A x B. The dimension, (by default is set to 1.00 x 1.00 m), is controlled by using hotspots. (Unfortunately, currently there’s no way for GDL to request zone’s geometry data from ArchiCad so we have to define it manualy)
Zone Size is available under the “Extended Parameters”
The hotspots are visible when at least one cell is set to display “Zone Size”.

Adjusting the hotspots is simple. Move the bottom-left hotspot (Reference point) to the bottom-left of the zone, use the rotate-hotspot to rotate the shape if needed. Then use the top-right hotspot to define the Zone Size (Dimensions).

The Zone Size polygon (the rectangle with diagonal line) is there for better visualization. To turned it off before publishing the documents, go to “Zone Size (Room Size) Settings” tab and unchecked the “Show Zone Size Polygon in 2D”. You can also find other options for Zone Size here.
