The Topics item on the help menu opens the Help Contents tab.

The Contents tab is an expandable and collapsible table of contents. It is most useful if you're looking for general information or are unsure what index term to use to find what you're looking for.

For example, you could...

Double-click the closed book icon next to Graphical Analysis.

Double-click the closed book icon next to Finding the chart type you want.

Double-click the question mark icon next to Gallery of all chart types.

This opens a help topic with links to the various types of charts available.