Is it possible to create a new layer, and then save it to be merged later? The reason I ask, is that I am restructuring maps on my website, a process which requires repeated file saving and although I am working on the files in TIF format, they tend to degrade after a while. To work without saving is high risk, as a great deal of hard work can easily be lost, as I have found out. I thought that if I could spread out the saving process, it would improve matters.
Thanks in advance.
Eric