Solidworks Using guide lines and center line in lloft 

Omg thank you very much !!! i was searching how to use the guide line this helped me soo much !

thank you so much!

@DamodharanR16 t really was a straight forward question , the thing you were making just disappeared , i found out if you press F it will come back

you see where that dissapeared on you at 3:15 , what did you do to get it back

ta bueno