First, rename the original template and make a copy. Never work with original files. The templates are stored
in C:\Cakewalk Content\SONAR Platinum\Project Templates. Open make changes and then when completed save as.
Choose type as Template in the box at the bottom of the screen and open the folder link as above and save with your new name. When you open Sonar and click on New. Select the template you just saved and click Make Default. Each time you open Sonar afterwards it will open your Template. Tweek again if you require further changes and do the same until you are happy with the results. You still have the original if ever you want to revert back.