This happens when the "instant formatting" is off.
Click on the EndNote tab, and in the "Bibliography" section of the ribbon, there is a function "Instant formatting is off". Click on that down arrow, and select "Turn instant formatting on"
This happens when the "instant formatting" is off.
Click on the EndNote tab, and in the "Bibliography" section of the ribbon, there is a function "Instant formatting is off". Click on that down arrow, and select "Turn instant formatting on"