You can hide Yahoo! Toolbar temporarily so it doesn't show up on your browser by doing the following:

1. Click "View" on the browser menu bar.
2. Select "Toolbars" then click "Yahoo! Toolbar".

If Yahoo! Toolbar was visible on your browser, this hides Yahoo! Toolbar. If it was already hidden, this makes it appear.

You can tell if the toolbar is visible or not by the checkmark next to the "Yahoo! Toolbar" line. If it's checked, then it's visible. If there's no checkmark, then it's hidden.