After generating a particular Sale order, you wish to see the sales invoice of that particular order. In order to see a particular invoce of a sale order. first visit any sale order number from the Sale order list by clicking on the SO-xxx number. Then a profile window of that sale order will appear as shown below:
Notice that on the upper right corner of the screenshot labelled as green box " Report" by clicking on the report you can see an option of invoice. Clicking on that will take you to the invoice pattern window. See the screenshot below for understanding
From the above window screenshot, you can select the pattern type to represent the sale invoice report as well as you can choose the specific sale order number to show the sales invoice.
By clicking on preview and print, it will show as shown below: