Now click on the action menu (down arrow) on the right hand side of the screen, for the sales quote you wish to modify. You will then see a drop down menu as shown below.
Click on the Update Status menu option. You will then see the side-draw appear from the right containing all the options to update the status of the sales quote (as shown below).
Now click on the OUTCOME drop down data item. Select the option "Lost".
You will be then prompted to select the Reason Lost. Click into the Reason Lost drop down as select the appropriate reason for losing this sales quote.
Click on the Save button to commit your changes.