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Yes, I believe you gentlemen are looking for the Flexible Pattern Resizer:
https://forum.renoise.com/t/new-tool-2-8-3-0-flexible-pattern-resizer/30664
Works on a pattern basis…so if you need to resize just a part of a pattern, use the built-in “split and join pattern” feature.
Split: Pattern Editor > rightclick > Pattern > Split
Join: Pattern Sequence > rightclick > Organize > Join
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Yes,I knew there was a tool! 
In fact, I already had downloaded, but I have not yet had the need to use it seriously…
Maybe rescue some theme of new age in IT format (Impulse Tracker) to convert, and this tool is useful also.Surprisingly I have very old themes saved in diskette :o.
Thanks for the info!