To make the selector more stable, I like to edit the selector by Selector Builder. How can I get that menu ?

To make the selector more stable, I like to edit the selector by Selector Builder. How can I get that menu ?
Go to your UIs in the top right, right click the one you want to modify -> View. It will bring up a 1-liner pop up. Click more, (or right click->view again) and it will bring you to the selector edit screens where you can add/remove properties or even change the modifier such as Equals or Contains on each property.
best of luck!