I was formatting the grid for the overview map. However, I found that the formats didn't work at all. In the attachments below, I attached two pictures: the upper one is the pre-formatting and the lower one is after the formatting. There were no changes. I already did the ctrl+F5 to refresh the map, but it didn't work. It was clearly shown that the offset must be in 100 mm, but there were no changes. The offset still looked like the pre-formating with a 2 mm offset. The interval also didn't change at all. What should I do to correct this error?
FYI, I used the ArcGIS Pro 2.7.3, and I thought there was something unstable with this update.

