Yes, you can easily select all invoice lines in one go, which makes it easier to perform various actions (such as coding and viewing line details) for many items at a time. To select all lines in one go, do as follows:

• Select any one of the invoice lines by ticking the box to the left of the line.
• In the lower left corner of the screen, the text "1 of X lines selected" is displayed, X being the total number of lines in the invoice. Click the blue box next to the text:
  
  
  
  
• This will select all lines in the invoice and change the text to "X of X lines selected":
  
  
  

To deselect all lines, simply click the blue box again.

It is also possible to select multiple but fewer than all lines, but this must be done manually line by line: Simply tick the boxes to the left of the relevant lines.