Dear friends, I got 2 interesting books about troff of theyear 1987. Especially two 2-char collections in tbl-parts are useful. These collections become the meaning of tab chars for cell jumping.
1) Sandra L Emerson, Karen Paulsell - troff TYPESETTING for UNIX(TM) Systems (1987) This book seems to come from System V. It documents that "(T)" has the meaning of a tab char for cell jumping. 2) David Barron, Mike Rees - Text Processing and Typesetting with UNIX (1987) It documents that "<T>" has the meaning of a tab char for cell jumping. So far, groff does not use these. With these additions the line with tab(...); is no longer necessary. I have now trouble with C++. So could someone else try to add these character combinations to the .cpp files in src/preproc/tbl? It might be possible, to allow also strings in the tab()-line as a first step, instead of now only single character methods. Bernd Warken