Hi,
(Assuming you are referring to Creo Schematics) Design sheet templates/Catalog sheet templates are not saved as part of the Central catalog, therefor you don't see it in your design. you can export design properties from your master design and import them into your design which need to be updated. this will align both catalogs to be the same. after import you can change the sheet format to use the updated one.
in addition, make sure the new sheet format use the same units as the used on the sheet you like to update. 'Change Sheet Format' does not change sheet units.
Gaby
