Saving

File | Save – saves a single file
File | Save All – saves all open files
File | Save As – saves a file to a new destination.

Save button is disabled

“Sometimes after making changes to my file, the save button does not work.”

The Save button is enabled only from inside the editor (i.e., tab) for a grid or text page that has been modified. Use Save All from everywhere else. When only one file is open, Save and Save All have the same behavior, i.e., they save the file.

An object that has been modified is identified with a *. In an object view, the status column displays the *. If the object is open, its tab also displays the *.