Hyrule Compendium

The is a Sheikah Slate function in.

Location and Uses
When Link obtains the Sheikah Slate, some of its data, including the Hyrule Compendium, is damaged. In order to repair it, he must progress through the "Slated for Upgrades" Side Quest at the Hateno Ancient Tech Lab.

The Hyrule Compendium compiles pictures and information of every creature, monster, Material, piece of equipment, and treasure. In order to register an entry, Link must take a picture of the subject with the BotW: Rune. Alternatively, once the "Sunshroom Sensing" Side Quest is completed, Link can purchase any missing picture from Symin for 100 Rupees each. Once Calamity Ganon is defeated, pictures of elite enemies and bosses can be bought for 500 Rupees each. Entries saved in the Compendium can be detected using the Sheikah Sensor +.

Once Link completes the Hyrule Compendium, he can obtain the Classified Envelope from Symin. Equipment and monsters exclusive to the Expansion Pass DLC are included in the Hyrule Compendium, but some are only available in Master Mode. Due to these extra equipment and monster entries, some entries may have altered number listings from the base game dependent upon whether or not the Expansion Pass DLC has been purchased and these numbers could be further different depending upon whether or not the game is being played in Master Mode. All number listings for entries are noted below in the following format: Normal # prior to DLC Pack 2(after DLC Pack 2) / Master Mode # prior to DLC Pack 2(after DLC Pack 2). Creatures and equipment exclusive to amiibo are not included in the Hyrule Compendium.