Thank you very much ....

Hello every body,
first I'm sorry for my english very poor but i try to explain my little one problem about sketchup 7.
Could you tell me how to hide "point" beetween 2 line ? (cf join photo)I thinks it's on sketchup menu but i don't found where ....
I don't have the problem on previous project but only since the last update and last project (the beginning of my swimming pool.)
I hope you understand my problem not really important but i found this very ugly

thx for all

Pat