After you have installed the plugin, a few new options will appear in File | Preferences.
The two main parts of the new options are KNIME | Report Designer and Report Design. In KNIME | Report Designer there are only two options, which you most probably do not want to change if you prefer having an up-to-date state of the data.
In Report Design, there are many preferences; we will cover only a subset of them.
Within Report Design, the Preview subpage might be interesting, because you can customize how the preview should work, such as setting the locale, time zone, bidirectional orientation, using external browser, or enabling SVG charts. You can also disable the master page in previews. In its Data subpage, you can set bounds on data usage for previews. If you are bound by your machine running KNIME, you can also use a server to generate the preview of the reports. To do this, you have to specify the server in the Preview Server page in Report Design.
In Report Design | Crosstab...