An SATB score looks crowded the first time you open it because four people are singing at once and the page has to show all of them. It is not eight random lines. In the usual closed score, two staves carry four voices. The top staff holds soprano and alto. The bottom staff holds tenor and bass. Once you can name which note belongs to which singer, the page becomes a seating chart you can point at during rehearsal.
Reading that page is a director skill, separate from writing the harmonization. You need to see the chord straight down on one beat, follow a single voice across the bar, and notice when the text and the notes disagree. This guide is that reading. The harmonization guide is how the chords were chosen. The voice-leading guide is how each line moves to the next chord. You will use all three, but you only need one of them in your hands while the choir is waiting.
Two staves, four voices, one beat at a time
Start with the system, not with the first note. A system is the pair of staves that sound together, braced on the left. Everything stacked vertically inside that pair happens at the same time. The soprano note, the alto note, the tenor note, and the bass note on beat one are one chord, even though they sit on two staves. If you read only left to right, the way you read a solo song, you will miss the chord and then wonder why the choir sounds different from the line you were tracking.
Stem direction is how one staff holds two voices. On the top staff, stems up are usually soprano and stems down are usually alto. On the bottom staff, stems up are usually tenor and stems down are usually bass. When both voices on a staff sing the same pitch, you will often see one notehead with two stems, one up and one down. That is unison, not a missing singer. Say the voice name out loud the first few times you point at a note, until the stems stop looking decorative.
Barlines and beats are the other grid. In four-four, beat one is the strongest place to look down the chord. In three-four, beat one is still home, and beat two is often passing. Before you analyze a hymn, count one bar with your finger on the beat, not on the prettiest note. Directors lose their place when they follow a moving alto and forget that the bass already changed. The beat is the column. The voice is the row. You need both.
Clefs, and the tenor note that is not as high as it looks
Soprano and alto are written in treble clef. Bass is written in bass clef. Tenor is the clef that tricks new directors. In many modern SATB scores the tenor shares the bass staff, so the printed pitch is the sounding pitch, and the stem tells you it is the tenor rather than the bass. In other scores, especially older or British ones, the tenor has a treble clef with a small 8 underneath. That clef means the tenor sings an octave lower than a soprano would sing the same staff position. If you play those notes as written at the piano, the tenor line will sound like a scream that the section is not actually singing.
Check the clef at the start of every system, not only at the top of the page. A score can change clef for a passage, and a courtesy clef at the end of a line is easy to skip when you are tired. Middle C is the landmark. In treble clef it sits on the first ledger line below the staff. In bass clef it sits on the first ledger line above the staff. If you can find middle C on both staves, you can name the chord without guessing which C you are looking at.
Range on the page is not the same as comfort in the room. A printed soprano D5 is inside the window a CantuStudio draft is allowed to use, which runs soprano C4 to D5, alto F3 to C5, tenor B2 to G4, and bass E2 to D4. Seeing the note inside that window does not mean your section can hold it for a whole phrase. When you read a draft, circle the highest and lowest note of each voice before rehearsal and sing them. A note you cannot find at the piano in tempo is a note the choir will not find either.
Read down for the chord, then across for the line
Vertical reading is the director habit. Stop on a strong beat and name four pitches: soprano, alto, tenor, bass. Then name the chord, even roughly. You do not need a roman numeral in front of the choir. You need to know whether you are hearing a tonic, a dominant, or something that has not resolved. If you cannot find the bass note, you cannot tell the choir which pitch is the root. Practice this on one hymn you already know, four chords only, until the down-the-page look is faster than spelling each note from the clef.
Horizontal reading is how you help one section. Cover the other voices with a card, or mute them in playback, and sing only the alto from the previous chord to this one. A line that leaps a sixth into a weak beat will look harmless in the full chord and feel impossible to the three altos who have to find it. The voice-leading guide explains what that leap is supposed to do. On the page, your job is to see the leap before the choir sings it wrong three times and memorizes the wrong one.
Do both readings on the cadence first. The last two chords of a hymn are where parallel octaves between soprano and bass show up as an empty ending, and where a leading tone that fails to rise makes the phrase sound unfinished. Look at those two columns before you sight-read from the beginning. If the last chord is not the tonic you promised, or the soprano and bass have become the same line an octave apart, you have found the bar that will embarrass the ending. Fix or mark it before you start bar one.
Syllables, hyphens, and the word the high note is sitting on
Choral text sits under the notes, with a hyphen when a word breaks across more than one note, and an extension line when one syllable is held. One note, one syllable, unless a slur or a tie says the syllable continues. If two syllables are crammed under one note, or a single vowel is chopped into extra notes the speech would never stress, the choir will hesitate even when the pitches are easy. Read the text as a sentence before you read it as noteheads.
Stress is a reading problem, not only a writing problem. In English, the accented syllable wants a stronger beat or a longer note. If the highest soprano note of the phrase lands on a weak word such as and or the, you will hear the choir punch the wrong syllable. You can still sing it, but you should know you are fighting the language. Mark the stressed syllables in pencil. When a draft was generated from a melody without the text attached, this check is yours. The software did not hear the sentence.
Breath marks belong in the reading, too. A rest on the page is a silence you can see. A breath the composer did not write, but the sentence needs, should be penciled in the same place for every voice, or the sections will not arrive together on the next chord. Do not add a breath in the middle of a word because the bar feels long. Add it where a speaker would pause. Then check that the chord on the far side of the breath is one the choir can find, usually a tonic or a dominant they have already heard.
Mark the page for the rehearsal you are about to run
A clean score is a hard score to conduct from. Before rehearsal, circle three things only: the cadence, any leap an inner voice will miss, and any note outside a comfortable range for the section you actually have. Three marks are usable. Thirty marks are camouflage. Use one color for pitches and another for text if you must, and write the breath in the same place on both staves so you are not giving the women a comma and the men a different one.
Number the bars, or number the systems, if the copy does not already. You will say bar twelve out loud. If the only way to name that spot is after the second page, third line, the choir will still be looking when you are ready to sing. A generated draft that you export to PDF should get those numbers before you print a stack. Pencil them on one master, then print, so every folder matches the bar you call.
If you are reading a CantuStudio draft, use the voice-leading report as a list of places to look, not as a grade. It flags parallel fifths, including a twelfth, parallel octaves, including unison, voice crossing, range, and a non-chord tone left on a strong beat. A rest means that pair is not called a parallel. Contrary motion into a fifth is not called a parallel. Open the bar the report names, read down the chord, and decide whether you agree. Then sing the pair. A report can be right about the interval and still leave you more than one legal repair.
Look at the choir more than you look at the page
In rehearsal the score is a reference, not a script you recite with your eyes down. Glance at the page on the preparation, on a rest, and when the section changes. While they sing, watch the mouths and the entries, and trust the marks you already made. If you have to stare at beat three to know who enters, you have not read the score yet. That reading happens at the desk. The room is where you confirm it.
When a section is lost, do not describe the whole system. Name the voice, the bar, and the interval from the note they just sang. Tenors, bar eight, step down. That sentence is only possible if you already did the horizontal reading. Pointing at a cluster and saying something sounds wrong wastes the minute you had. The SATB arranger is where you can mute one voice and hear the line before you walk in, so the sentence is ready.
After rehearsal, put the corrections back into the file, not only into the pencil copy. A leap you simplified, a breath you moved, a key you dropped by a semitone, all need to be in the version you will export next week. PDF is the paper. MIDI is what a singer loops at home. MusicXML, a Pro download, is the file you keep editing in a notation program. A free account does not receive the .musicxml file. The hymn arranger and the MusicXML harmonization page are the ways back into the draft. English pricing is where the export limits are stated. Reading the score well is what tells you which of those corrections are worth making.