Update the user's guide introduction: addition information about partset and parts.

diff --git a/doc/gui/Introduction.rst b/doc/gui/Introduction.rst
index 0a3075b42f6d09e8048f8d4a92c91846d6e08399..f1163d65a6c50a4f440eab12f9fe2b15ee3bce82 100644 (file)
--- a/doc/gui/Introduction.rst
+++ b/doc/gui/Introduction.rst
@@ -28,7 +28,7 @@ SHAPER module works with one study containing several documents:
 - partset\r
 - one or several parts.\r
 \r
-Only one document can be active.\r
+Only one document can be active. In complicated models partset consists of several parts. Parts in partset may be copied, positioned relatively to each other, or simply translated.\r
   \r
 A new study contains only a partset with 7 default constructions, which cannot be deleted:\r
   \r