--- a/QTfrontend/ui/page/pagesingleplayer.cpp	Wed May 16 18:22:28 2018 +0200
+++ b/QTfrontend/ui/page/pagesingleplayer.cpp	Wed Jul 31 23:14:27 2019 +0200
@@ -48,7 +48,7 @@
     BtnCampaignPage->setVisible(true);
 
     BtnTrainPage = addButton(":/res/Trainings.png", middleLine, 1, true);
-    BtnTrainPage->setWhatsThis(tr("Practice your skills in a range of training missions"));
+    BtnTrainPage->setWhatsThis(tr("Singleplayer missions: Learn how to play in the training, practice your skills in challenges or try to complete goals in scenarios."));
 
     return vLayout;
 }