How to change the size or font of a reference layer?

[KeWang1]

How to change the size or font of a reference layer?

I have a ocean reference layer with all oceans name on it. After adding to the arcgis pro, it shows the all kinds of oceans names, but how to change the size or font or how to change it to other language? Thanks

[DanPatterson_Retired]

Basemaps—ArcGIS Pro | ArcGIS Desktop 

You can make your own, but the defaults are pretty well what you see