Open your model in Bambu Studio
Click the Support tool in the top toolbar
Enable supports for the model
Choose the support type you want
Select Auto Supports to generate supports automatically
Use Manual Supports to place supports yourself
Add support points on overhangs or weak areas
Remove support points from areas you do not want supported
Adjust support density if needed
Adjust support angle threshold if needed
Adjust support interface settings if needed
Preview the sliced model to check the supports
Modify support placement until it looks correct
Slice and save the final print file