I'm still in the process of tagging pages that were migrated from the old site, so for now you're best off using the search engine rather than relying on the tags.
- How to get window properties and information - Use the xprop command to get a list of properties for the selected window, such as its name and state, and xwininfo to get information about the window, such as its size and position. Run the command and click a window. You’ll get output a little like ...