Most windows have the traditional window border and the usual method works, but not the native Elementary programs. And in certain other programs, like the GUI designer 'glade' shown below. As it opens I cannot use the interface to add widgets etc to a GUI design.
It can be done however! By holding down the 'Windows key' (the one between the left side CTRL and ALT keys) and holding down the right mouse button on the edge or corner of the window.
Freya has a lot of annoying little quirks. But so far it has been the most stable, forgiving and almost crash proof 'modern' Linux distribution I have ever used. But many of the functions we have come to expect to be easily available are hidden away and some only seem to be accessible as keyboard shortcuts.
Here is a list of common keyboard shortcuts in Elementary OS Freya.
|⇧+Alt+Tab||Switch Windows Backwards|
|⌘+A||Window Overview (Across All Workspaces)|
|⇧+⌘+Left/Right||Move Window with Workspace|
|Ctrl+⌘+Left/Right||Snap Window to Half of Workspace|
|⌘+Secondary (Right mouse button) click+Drag||Resize Window|
⌘ = Super (Windows or Command key),
⇧ = Shift