When you select this item the panel below slide out from the left side of the screen showing the configurable print options. Printing from within the browser is not as easy as it really should be, it's certainly more complicated than printing from within an EXE. See Browser Printing for more information about printing.
Close
As you'll find elsewhere in the Apps, close the slide out panel by clicking this icon, remember that any changes you make will not be applied if you close the slide out this way.
If you want to print with the Portrait page layout check this option. Please note, this is an App setting, NOT a printer setting. When you print something like a chart or a report the App will use this option to decide how to size and layout the item, but you will also have to set up your printer separately to get the right paper orientation on your printer.
Select this option if you want the App to split the charts so only one is printed per page. Again, this is an App setting, you will have to configure your printer separately as well to get the results you want.