XS_REBARSET_REBAR_LAYER_FORMAT_STRING
Category in Advanced options dialog: Concrete detailing
Use this advanced option to define the contents of the template attribute LAYER.
The default value is
%LAYER_PREFIX%%LAYER_NUMBER%, for example T2
for the second layer of top bars.
This advanced option is model specific and the setting is saved in the options database. Reopen the model to activate the new value.