How to Change the Storage Type and Meaning for all Columns in a Dataset?

[UserBird]

Hi, my dataset contains many thunders of columns for which I need to adjust the storage type to bigint and the Meaning to integer. Can I do this efficiently?

[AdrienL]

In a Preparation recipe, you can use the Column view (button above the table on the right) to mass-select columns and change their type all at once.