I am still not having found it. I found some other things with other items but don’t know how to look to find it. I assume it may be nearby the place I need to use it but maybe it’s too dark in my house .
The screwdriver requires the notebook secondary puzzle (the bottom text) to be solved - make sure you've clicked that text, and also make sure you're holding the notebook when exploring around.
I tried to solve the movement puzzle (with the notebook equiped) on the color squares but it didn't react if I click on one of them (is it supposed to react ?).
I don't know what D means on the notebook if you had a clue.
I found it and figured the importance of the sentence on the notebook. I was saerching withthe colors squares but it was in plain sight in one of the room.
Thank you for your help. I am continuing to try to find the exit of the escape room.
Yes. I'll be more spoilery for you here: If you've clicked the red square on the ground (near the entrance), make sure you have your notebook equipped and then you can look down at it. It'll turn green. Once you get off that screen, begin the sequence in the notebook. U, TR, whatever the order.