When you first create a new Collection, there are no Projects listed. You use Projects from other Collections by setting their 'In Use' status via the 'Set Projects In Use' list. The prices are Collection-season specific, so any changes made to costings will not impact the prices of the Project listed on other Collections.
You can select a specific Collection via the Collection dropdown or use Select/Move/Filter to apply further filters
Save is automatic
All Raw Materials required for these products are now automatically visible in this season.
If you now change any details in the Project except Exchange Rate, Make/First cost or Wholesale/Retail prices - it will carry through to ALL other Collections the Project is listed on.
If a Project - Colourway already published is republished via another Collection which is assigned to a season which it isn't already visible in, the existing Product Costing will be made visible in the relevant season.