In medium size bowl, make a layer of sliced cucumbers, then lay 3-4 rings of onion on top, sprinkle with salt. Repeat layers, heeping in the center. Cover with a heavy plate or a plate with weight on it (I use a can). Leave out at room temp. for 5-6 hrs then drain. Mix together 1 cup white vinegar, sugar, what ever seasoning you prefer such as Cavenders greek seasoning or basil ect and pepper to taste. Refrigerate over night.
Thanks to Ann Humphry.