When you press the Print button on a screen, a window will appear as follows:
The fields are:
Printer - shows the default printer for your current location - if this is defined (see Administration|Organisation|Practice Location), otherwise the first available printer. Use the pull-down to select the required printer.
Copies - set the number of copies required
Press OK to print on the selected printer. Press Cancel if printing is not required.
The Preview button will generate and display a copy of the document in your browser. Note that on most screens that have a Print button that invokes this screen, you can use the shortcut Alt-V to immediately preview the output without calling up this screen.
The Mail button will generate a copy of the document and bring up an email window so that you can email the document.