How can I see how a roll was calculated?

I would like to see all the numbers used to calculate the roll result. A roll "to hit" may have Stat modifiers, Effect modifiers and Cover modifiers but I can only see an adjusted modifier being added or subtracted from the roll to give the result. I want to see how the adjusted modifier was derived.

To answer your question based off generic FG rulesets: FG won't detail each individual effect that is applied to a roll. If individual modifiers are used (via the modifier box) then that will usually (can be ruleset specific) list each individual modifier.

If the modifiers are applied by effects you can check the entries in the combat tracker to see which effects are active.

Thank you!