Adding bonus rolls to damage

So I know there's a way to add barbarian rage and rogue sneak attacks to the character sheet, I can't figure it out. I'm hoping to avoid heavy macro usage, I just want to allow my warlock's character sheet to add Hex and Hexblade's Curse damage to the roll automatically without having to manually type out "/r 3d6+9" after every attack flurry to damage total.  I'm not someone who works in codes so the simplest solution would be the best. Preferably a button you press to add the damage to toggle if the damage is rolled after an attack.

Easy-peasy. You need to go to the character's settings tab and activate Global Attack and Damage Modifiers . These can be toggled on and off by the player at need. 

Thank you so much! Sorry for the noob question but I haven't used the character sheets on Roll20 much. Again, thank you for your help.