All the Roll20 sheets became proprietary a while back and the newest code hasn't been shared with us. Since this is a sheet that hasn't seen much recent development since the release of Pathfinder 2E, you might be able to work from the code on github. <a href="https://github.com/Roll20/roll20-character-sheets/tree/master/Pathfinder%20by%20Roll20" rel="nofollow">https://github.com/Roll20/roll20-character-sheets/tree/master/Pathfinder%20by%20Roll20</a> There is a wiki article on creating tabs in character sheets. You are probably best served by seeing how it is done on that sheet to slip something in. <a href="https://wiki.roll20.net/CSS_Wizardry#Tabs" rel="nofollow">https://wiki.roll20.net/CSS_Wizardry#Tabs</a> As for how I manage items on that sheet, I generally add wondrous items to regular inventory. Then, abilities from any that cast spells are added to the "Spell-like Abilities" section on the Spells tab. Any that add bonuses to stats are added either as a buff, or input on the config tab along with racial stat bonuses. Any that give various bonuses to AC are added as pieces of armor, since you can specify the exact type of bonus there.