Remove underline from ALL links
1. Click the Stylesheet tab in the left panel
2. Select General Styles
3. Click Link
4. Deselect the U to remove the underline from ALL your links
Remove underline from ONE link
1. Click on a text block in right panel
2. Click the Styles tab in the left panel
This will be defaulted to 'This block' which means any Style updates here will target this block only.
3. Click Link
4. Deselect the U to remove the underline from links in this text block only