Not sure if this was brought up before, how do you apply other magic items such as Bracers of Archery and Cloak of protection?
Cloak of Protection: for AC use the Other area of the Armor block on the Start page. For the saving throws, on the Start page in Block 1 enter 1 (or increment by 1) for all Saving Throw adjustments.
Bracers of Archery: In the "Additional Weapons and Armor Proficiencies" area add Longbow and Shortbow if you do not already have proficiency in them. For the +2 damage, there are more elegant ways, but a Q&D version is to use the damage override of your bow weapon and add 2. For a longbow it might be ="1d8+"&DEXMod+2.
Take note of what you change so that it can be undone if you stop using that magic item.