Today I did measurements for CD case and my CD all of which I put onto VLE afterwards.
Doing my meseaurments for my cover and label I used the guide line tools and a ruler- which shows up on the sides with figures just to confirm I had inserted the values correctly. On the top of photoshop there is a view button wich has a drop down bar inside I found new guides which allows you to insert specfic values to your guide lines providing a greater accuracy and saving time.
This is the template for the cover of the case which I saved as a template because I inteneded on making more than one draft for my project.
This is a template of my CD label also saved as a template for future drafts.