Add Sheet

When adding another sheet to a drawing, Via the tab command"ADD SHEET", where in SolidWorks does it point to the template usedfor SHEET 2 thru whatever...?

Currently our formats contain 2 sheets. When I need to add anothersheet, the New Sheet does not look like Sheet 2?

Also, what would the file extension be for a second sheet? I amseeing D2 Sheet.drwdot and D2 Sheet.slddrt.

Hopefully I make sense here as I am new to this.

SW07.
SolidworksGeneral