Here is another view from the character editor outside of the game. A different mastery is selected with the same result. This is just one of many issues with this sheet and the 2024 PHB. *EDIT* The individual weapon masteries are there. Nick, Cleave, Sap, etc. The drag and drop does function correctly. I was confused by the multitude of individual weapon mastery tabs. Longsword weapon mastery, Battleaxe weapon mastery, etc....these individual entries have no content, hence no drag and drop. There is a tremendous amount of bloat between the free rules and the 2024 PHB. Not to mention every other sourcebook one has purchased.