single sided board in eagle into a double sided board?

i have a one sided board in eagle and i need to know how into a double sided board so i can etch it

jeff-o6 years ago
To move traces from one side of the board to the other, select the "change" tool (the little wrench) then choose layer. Select the layer you want to switch traces to. Now click any traces that you want changed.

To move a surface mount part to the other side, use the "flip" tool.

One other way to change the layer is to use the "info" tool (the little "i" button), click on the component or trace, then choose the new layer from the pull-down menu in the window that opens. Click "OK" or "Apply" to make the change.

Finally, you can change entire sections of traces from one side to the other by selecting them with the "select" tool, then choosing the change>layer tool, then command-right-clicking on the selected elements.
I don't understand the question. Why do you need two layers of a single layer board ?