Change the order of the parts on the parts list is not possible

Hello,
I have the following problem in Bambu Studio:
I can’t change the order of the parts on the printing plate. Normally you can do this by moving them with the mouse in the list of parts.
In my case, the body is highlighted when I click on it and if I then drag it upwards with the mouse, other parts are highlighted, but the selected part is not moved.

I work with MacOs. and have the current version of Bambu Studio

for explanation:
I want to ensure that the print is continued with a specific body after a filament change

The print order of parts can only be adjusted when you have the print sequence “by Object” selected. There isn’t a way to select which part is printed when printing in “by Layer” mode.

Ok, thanks for the answer, I thought it would also work when printing in layers.
Then I guess the only option is to place the parts one after the other in the required order on the building board.