Shared Pages Document Can't Create New Styles
I'm using macOS 11.6.1 and Pages 11.2.
In Pages, when I create a new Pages document I am able to create new styles (Format -> Advanced -> Create Style); however, when I attempt to create a style in an existing document, the "Create Style" option is greyed out.
The existing document has been around for a couple of years (it is a design specification for a development project) and it gets frequently updated. It is also shared with my team.
Any thoughts as to why "Create Style" is greyed out in this document?
Thanks,
Mark
Mac mini, macOS 11.6