Alternatively referred to as edit, edit mode is a feature within software that allows the modification of files. A good example of a program with edit mode is MS-DOS Editor. Most programs with edit mode toggle between "view" and "edit." When in the "view mode," the user can only look at the file; however, in "edit mode," the user can view and change the file's contents. Often, these modes are utilized for files that are shared between multiple users on a network.
What is editable?
Anything that can be edited (changed) is described as editable. For example, the text on this web page when viewed online is not editable. However, the text in a text box like the one shown below is editable.
When text is not editable, some features may not work. For example, the cut feature and shortcut does not work with text that is not editable. You cannot cut any of the text in this paragraph. However, you could cut any of the text in the above.