Why grids matter

A layout without an underlying structure produces visual restlessness — the eye has no consistent entry points, no predictable rhythm, and no sense that the designer made deliberate spatial decisions. A grid provides that structure: consistent alignment axes that connect elements across the page, consistent spacing increments that create visual relationships, and a set of spatial decisions made once that govern all subsequent placement choices. The viewer doesn't see the grid. They feel the order it produces.

The grid is a starting point. Professional layout work uses the grid as a foundation and departs from it when the content requires — a full-bleed image that breaks all columns, a headline that spans the gutter, a diagram that needs its own spatial logic. What matters is that departures from the grid are deliberate, not accidental.

Column grids

A column grid divides the page width into equal vertical divisions separated by gutters. Columns provide the primary alignment structure for both images and text. Column counts and their implications:

For a 24×36" poster, 3 or 4 columns gives enough flexibility to vary image sizes while maintaining structural order. For portfolio project pages at 8×10", 2 or 3 columns are typically sufficient.

Baseline grid

The baseline grid is a horizontal grid of evenly spaced lines that defines the vertical rhythm of the layout. Text set to "align to baseline grid" snaps to these lines, ensuring that text in adjacent columns aligns horizontally regardless of leading variations or paragraph spacing. This creates the consistent horizontal register that distinguishes professional typesetting from casual layout.

Set the baseline grid increment to match your body text leading: if body text is set at 11pt type / 14pt leading, set the baseline grid to 14pt. View → Grids & Guides → Show Baseline Grid to see it. Enable baseline grid snapping per paragraph in the Paragraph panel (the align-to-baseline-grid icon at the bottom right of the panel).

Consistent spacing — the practical principle

Whether or not you use an explicit grid system, consistent spacing is non-negotiable. The space between any two content items should be either identical to or a clear multiple of the space between any other two content items. If images are separated by 0.25" gutters, text frames should also be separated by 0.25" or 0.5" — not 0.23" because that's where they happened to land.

Use the Align panel (Window → Align) to enforce consistent spacing. Select multiple objects and use Distribute Spacing to set equal gaps between them. This is faster and more accurate than manual positioning.

Alignment and proximity as layout logic

Two principles from graphic design theory that directly govern how layouts read:

Alignment: Every object on a page should have a visual connection to at least one other object through a shared edge, center, or column boundary. Random floating objects — text blocks that don't align to an image edge or a column boundary — read as disorganized. Strong alignment creates implied structural lines that the eye follows through the layout.

Proximity: Related content belongs close together; unrelated content should be separated by noticeably more space. The gap between a photograph and its caption should be smaller than the gap between two separate content groups. Proximity communicates relationship before the viewer reads a single word.