Yes, you can select the checkboxes to the left of items to select multiple or all products in a location or system.
You can also use keyboard shortcuts.
Select all items
When in a location, system, phase, or category in the quote, click on one item to select it and then do the following:
On a macOS computer, press the "Command" and "A" keys simultaneously, and you will see that all items are selected.
On a Windows computer, press the "Control" and "A" keys simultaneously, and you will see that all items are selected.
Select some items
When in a location, system, phase, or category in the quote, click on one item to select it and then do the following:
On a macOS computer, keep the "Command" key pressed down and click on the items you want to select.
On a Windows computer, keep the "Control" key pressed down and click on the items you want to select.

