- Give users explicit information.
- Speed up access to the content.
Place, in each sized or modal window, a button or a link with explicit wording for closing and associate this button with a closing action.
For each "real" window (sized popup) or each simulated window displayed overlaying the content (modal window), regardless of the technology used:
- Check that the body of the sized windows and modal windows contains a button or a link to close them;
- Check that the wording of the button or closing link is explicit.
Windows which are only closed implicitly, for example via the escape key, invalidate this best practice.