[Help] Making a pop up like the 5e sheet when choosing spell level

Hi guys, Please excuse any miss-spelling or grammar mistakes I am dyslexic and I tried my best. Thanks for understanding. I'm with a group that has made a custom fallout pen and paper tabletop game and we are making a custom sheet for roll 20 but we are having a few issues. But the main one is we want to create a pop-up akin to the 5e sheet when choosing spell level. We want to use that to apply different modifiers to a d100 roll and it being a pop-up helps because the modifiers can change from roll to roll. For instance, if you crouch vs run on your turn that changes the modifier to your roll when shooting your gun. Any help with this would be greatly appreciated. Thanks

What you are looking for is the roll query syntax . Note that you need to be careful if nesting certain characters inside a roll query ; primarily comes up if trying to nest roll queries within roll queries or roll template fields in a roll query.

Thank you Scott is very helpful