The phrase "to curve the corners" means to slightly change or modify something, usually in a positive way, to improve its overall appearance or function.
Sentences with «to curve the corners»
The material covering the pillars on all four pillars have a brown color, with curved corner protective covers in black. (babieslounge.com)
The sleek phone has curved corners making it a bit attractive. (pcquest.com)
This large family bathroom has been given an air of luxury with an impressive curved corner shower and streamlined bath. (idealhome.co.uk)