I am working on a 2014 iMac on OS X Yosemite OS X Mavericks with 1980 x 1080 resolution and I need help with why the option to switch from Classic Mode to Source Mode sometimes disappears with some wikis but appears in some wikis, and how to fix this sort of thing. And I get stuck on that Classic Mode when sometimes I don't want to, and I don't want to go from Visual Mode into Source Mode as it just is too time consuming. I just want the choice of going to Classic Mode and Source Mode whenever and wherever I want to without this issue of not being able to do so or waste time and go to that super slow Visual Mode and go to Source Mode from there to put in source codes stuffs.
This whole issue of not being able to switch from Classic Mode to Source Mode wherever and whenever first appeared like a week or so ago, and I am sick of not being able to easily switch from Classic Mode to Source Mode wherever and whenever without having to go to that super slow Visual Mode that wastes like 5 minutes of loading times.