Click on the Print button in iShare GIS to display the Print drop down selection from where you will be able to select how you wish to print your map.
Printing to PDF
From V5.8.0 you will be able to choose to print to PDF using HiDPI Printing.
Printing to an Image
Use this tool to copy the Map, with the currently open map layers, to a png image which you can then right click on and save to a location of your choice.