Control center Global update

HI Community

Quick questions about Global udpates.

1) If a column name is changed in the blueprint via global updates, do all reports using the column have to be changed manually to replace the defunt column with the new one , or can global updates be used to update the report with the new column in the template folder and thereby all reports get updated?

2)Can new created reports in a template forlder be propagated across existing projects with global udpates?

Thanks as always