Select (activate) the tool and then press CTRL+A.
That will select all of that tools elements in the view.
You can place a marquee around an area and then activate tool and press CTRL+A, and that will select all of that tools elements but only inside the marquee.
If you have the tool active and hold SHIFT while you select, you can manually add elements to your selection.
If to elements occupy the same space or nodes or edges, it will select the element that matches the tool you have active first.
You can still add other elements by SHIFT click, but you need to select away from the overlapping elements (or activate a different tool to suit what you are after).
Barry.
One of the forum moderators.
Versions 6.5 to 27
i7-10700 @ 2.9Ghz, 32GB ram, GeForce RTX 2060 (6GB), Windows 10
Lenovo Thinkpad - i7-1270P 2.20 GHz, 32GB RAM, Nvidia T550, Windows 11