Multi term timetables

For each lesson, you can define in which terms this lesson can take place. You can specify one term, or you can say it can be in any term or on all terms. Moreover, you can say the lesson has to be in T1 and T2 or on T1 OR T2 or T4.
Here you can define your terms. Tick you have terms or weeks and then specify the appropriate amount of terms:

Use the button Edit if you want different names for terms.
Once you have said you are using terms, you can see a combobox where you can select a term you want to see:

And for each lesson you can define the term when this lesson can be.

Similar to days also for terms you can define special terms. If you have 4 terms, the software automatically adds two special terms called Semester 1 and Semester 2. Semester 1 is in fact T1 AND T2 so if you for certain lesson/course specify S1 then it will be on both T1 and T2 at the same day/period.
But if you for example specify T1 OR T2, then this lesson can be on either one and the software can choose which one during the generation.

How can I specify lesson is only on odd/week A?

If your school has different timetable on odd and even weeks (sometimes called weekA and weekB, you can simply define that you have two weeks:

Then for each lesson, you can say in which week it can be. Default is All weeks. This means it will be at the same position in all weeks. If you change this to lets say Any week, the software will allow you to place this lesson into week 1 OR 2.