After working on mapping for quite a while today and yesterday, the tract colors started disappearing. Depending on the view (zoomed in or out), some of the colors would come and go. I'm done mapping for the day and I suspect rebooting may help but I'm not going to bother and try that. I have closed and reopened the program though, but that's not helping. I have 1099 tracts. Please don't tell me my file is getting too big and I should reduce it. Well, you can tell me that, but I'll probably just endure it or something. Hopefully it's fixable. I also work with other windows open. Sometimes a couple and sometimes a few. I have ver. 3.0, build 20. Thanks! Marie.