I search for a simple tutorial teaching how to make an isometric map with the Tile map object but i couldn't find it so I decided to make one.
These is a fast tutorial, who ask to be improve, but it might help those who wants to build an isometric map.
1.Creat a Tilemap object with your Isometric tiles
in this one I use 64x32 px tiles separate with 1 px
2. Creat a second Tilemap object with the same tile above the first one
Here you change the properties ( if your tiles are good you should just have to divide by 2 the width and the height, not like mine )
And now with the "pencil tile tool", select your tile and draw them and your tilemap.
Be careful you can't drag your tile, you have to places them by clicking
I hope it will help some of you and if you find better or faster methods,please let me know.