How to change row format from compressed to dynamic for a particular doctype

kindly help me as i make a custom module which has 3 doctypes ,and all those doctype required different types of field for calculations…
as i find in the server i.e its row format is compressed and i want to change it to dynamic.

due to it i can’t create the custom fields.Capture
how can i change that.
help me regarding this.

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