hi
How can i make changes in simatic manager on read-only projects.

Hello

Do you mean that CPU is password protected? If so, look at What options exist for assigning passwords?,

If you forget the password, you do not have write-access (or read-access in level 3) in the password-protected CPU.
To restore access, you have to reset the CPU and reload the program into the CPU.

If your case is other, give more details about it.

Hope this will helps.

Best regards

Hristo Mihalev