Multiple selection

Lesson grid allows you to select more lessons from the same column:

- either use CTRL and click on desired cells - program will select cells separately "one-by-one".

- or click the top cell and while holding SHIFT click on the last cell, you will select all cells between them

- or hold SHIFT while moving with arrow keys on your keyboard, an you can select all cells from starting possition.

When the selection is made you can use right mouse button to modify it, or type lesson count or delete the lessons.