For some Marvin JS questions, the toolbar is wider or taller than the Marvin JS frame. If this happens, scroll buttons are displayed at the end of the toolbar. However, in older versions of the Safari® browser, these scroll buttons do not work.
If the scroll buttons work, use them to scroll the toolbar to access the hidden buttons. This is the expected behavior for Marvin JS on iPad®.
If the scroll buttons do not work, try upgrading to a newer version of iOS or use the Chrome™ browser to answer Marvin JS questions.