I am constructing a geological map which involves constructing boundaries to areas which vary in style across their length depending on how well defined they. To do this I have created two distinct layers called "certain" and "inferred", one solid the other dashed. I wish to automatically create a polygon fill surrounded by the boundaries, but when I use the lines -> polygon tool, I am only given the option to select one layer at a time.
Can I join the two layers together into one but retaining the changing style?
Alternatively, can I possibly change the style of the line within one layer, or can each layer only have one style?