When loading a new page there are two options, Don't ask to save the current page and Ask to save if current page has been modified. We highly recommend the second option. This way if the current page has been modified, the user will be prompted to save these changes before switching to the new page.
The default symbol is set to IBM and the default time frame is set to Daily. If you would like to customize this, simply select File - Preferences and modify the Symbol or Period.