Welcome Ankita Sharma,
After the installation of Optisystem software execution file, you have to run a different execution file namely Optisystem sample.
Now you can use the osd file which is contained in Optisystem sample folder which will located as your computer.
For example this folder is located in Documents directory in my computer.
Hope this will help you.
In optisystem 7 there is no need to ren execution file namely “Optisystem sample”, the sample file will contained in Local disk C-> Program file-> Sample file…