Working with joined lessons
lesson grid
You can quickly create joined lessons in the lesson grid.
1. Select multiple classes you wish to join in one subject's column - use "Shift" or/and "Ctrl" keys for multiple selection:
2. Specify the count of lessons per week (it is "two times per week" on picture) and the teacher who will be teaching this lesson:
3. Use the right click and from the context menu use the option "Join classes". It will create one lesson for three joined classes: 
Joined lessons are marked with "black strip". 
You can "split" these  classes from this joined lesson again via "right click". This operation will create one lesson for every class, which were joined in origin lesson (with same count of lessons and the teacher)
 
                 Slovenčina
								Slovenčina							 Deutsch
								Deutsch							 España
								España							 Francais
								Francais							 Polish
								Polish							 Russian
								Russian							 Čeština
								Čeština							 Greek
								Greek							 Lithuania
								Lithuania							 Romanian
								Romanian							 Arabic
								Arabic							 Português
								Português							 Indonesian
								Indonesian							 Croatian
								Croatian							 Serbia
								Serbia							 Farsi
								Farsi							 Hebrew
								Hebrew							 Mongolian
								Mongolian							 Bulgarian
								Bulgarian							 Georgia
								Georgia							 Azerbaijani
								Azerbaijani							 Thai
								Thai							 Turkish
								Turkish							 Magyar
								Magyar