## Steps to reproduce The following linux command will list all the undocumented calls to **agget** (the attribute fetching routine) in any .c or .h file in the **lib** directory tree (according to **doc/infosrc/attrs**) `grep 'agget(' $(find . -type f |grep '\.[ch]$')|grep './lib/'|gawk -F'"' '{print $2}'|sort -u|gawk 'NR==1{next}{print}'|while read X;do Z=`grep "^:$X:" doc/infosrc/attrs`;echo "$X +++ $Z";done |grep -v ':'` ## Expected Behaviour No undocumented attributes (naively) ## Actual Behaviour Several useful attributes discovered ## OS Version git source ## Additional info Undocumented attributes: - [ ] `_draw_` +++ required for _background, in lib/common/emit.c - [x] `TBbalance` +++ see here https://gitlab.com/graphviz/graphviz/-/issues/1339, in lib/common/ns.c - [x] `beautify` +++ sfdp attribute, in lib/sfdpgen/sfdpinit.c - [x] `cluster` +++ alternate to naming a graph "cluster...", in lib/common/utils.c - [ ] `clustercolor` +++ in lib/sparse/DotIO.c - [ ] `compact` +++ for edges into/out of a cluster, used to determine "is_a_strong_cluster", in lib/dotgen/rank.c - [ ] `labelaligned` +++ part of emit_begin_edge, in lib/common/emit.c - [x] `linelength` +++ used to determine max length of printed text output, in lib/cgraph/write.c - [ ] `odb` +++ used to help debug ortho lines (if #DEBUG is defined), in lib/ortho/ortho.c - [x] `oneblock` +++ circo only, in lib/circogen/circular.c - [ ] `postaction` +++ allows "reparseable input", in lib/common/input.c