The sheet has different sections under the character header that present information about different aspects of the game.
Abilities: This screen shows your ability scores, modifiers, and saves, as well as any relevant save modifiers.
Skills: This screen displays all of your skill modifiers, including proficiencies, Expertise, Jack of All Trades, etc.
Attacks: You'll see your equipped weapons and any spell attacks in this section. The ability to add custom attacks will be added later in the beta.
Spells: In this section, you can manage your spell slots, use the Manage Spells window to add known spells and to prepare spells, and view your prepared spells for table play. Spells that appear here can expand to display the spell's details and quick-info such as the Save DC and type.
Equipment: You can add, equip, and attune to items in the Manage Equipment window. You can also see encumbrance details, note other personal possessions, and manage your currency in this section.
Limited Use: This section aggregates all your traits, features, or abilities that have a reset condition, such as Short Rest, Long Rest, or Dawn. The intent is to collect special abilities you can't use at will in one place so your options are more visible.
You can track the uses of such abilities in this section by clicking the appropriate buttons.
The Short Rest, Long Rest, and Dawn buttons at the top of the section can be used to reset all the relevant abilities at one time. Hit Dice can also be tracked as part of a Short Rest.
Features: This section is a reference that displays all the various features, traits, proficiencies, or feats your character has. If you're looking for your feats, they're here. If you have a question about a class feature, find it here.
Description: Your character's background and personal characteristics are displayed in this section.
Notes: You can add notes in sections or create freeform notes that come up during play here.