Choose the pattern before the pictures
A layout pattern is a statement about order, not taste. A grid says every piece here is equal. A salon says these were collected over time. An anchored group says one of these matters most and the rest support it. Pick the statement that matches your pictures, then let it dictate frame sizes rather than trying to arrange whatever you already own into a shape it resists.
Two measurements narrow the field before any aesthetics are involved: the usable wall width between real constraints, and the width of the furniture underneath it. A pattern whose bounding box does not fit both of those numbers is out, however good it looks in a photograph of somebody else's room with somebody else's ceiling height.
Grid
A grid needs frames with identical outside dimensions and one gap value used everywhere. It suits square-ish walls, corridors, stairwell landings and any set of photographs treated as a series. Because every gap has a neighbour to be compared against, a grid is the least forgiving pattern and the easiest to get visibly wrong: unequal gaps or frames that differ by a quarter inch will show.
The nearest template is Quiet grid, six 8x10 frames in two rows of three at 4-inch gaps, occupying 32 by 24 inches. Scale it by swapping to 11x14 or 12x16 frames rather than by stretching the gaps, since a grid with 6-inch gaps stops reading as a grid and becomes six separate pictures in rows.
Salon or collage
A salon arrangement needs one clear anchor piece and a deliberate outer boundary. It suits large, awkward or tall walls, collected art in mismatched mouldings, and rooms where nothing else is symmetrical. The freedom is real but conditional: without an anchor, a wall of similarly sized mid-range frames reads as clutter no matter how carefully the gaps are set.
The nearest template is Collected salon, seven mixed pieces built around a 16x20 and a 12x16, occupying 47 by 36 inches. Its failure mode is a ragged outer edge. Decide the rectangle the whole group must sit inside before placing anything, and keep at least two frames touching each side of that boundary so it reads as intentional.
Balanced anchor
A balanced anchor needs one genuinely larger piece plus matched pairs. It suits sofas, consoles, beds and chimney breasts, anywhere the furniture below already defines a centre. It is the most forgiving pattern for mixed art, because the anchor carries the composition and the pairs only have to match each other.
The nearest template is Anchor balance: a 16x20 centre with a column each side, an 8x10 above an 11x14, aligned to the outer edges, occupying 40 by 33 inches. It fails when the anchor is not big enough to hold the middle, or when the pairs are almost symmetrical rather than exactly so. Use align and distribute rather than the eye for the pairs.
Linear row
A linear row needs matching frame heights, or at least matching centres, and a single centre height held along its whole length. It suits hallways, dining rooms, long low walls and runs above cabinetry. Seen in motion, alignment is the only thing a viewer registers, which makes this the best pattern for a corridor and the worst for a wall you stand still in front of.
The nearest template is Gallery line, four 11x14 frames on one shared centre line at 3-inch gaps, occupying 53 by 14 inches. It fails when the wall is too short, leaving the end frames crowded into the corners. Keep noticeably more clear wall at each end than the gap you use between frames.
Stair-step
A stair-step arrangement needs a consistent rise per frame and every frame hung level to the floor. It suits staircases, split levels and any sightline that climbs. The two classic failures are angling the frames to match the stair, which makes the whole run look like it is sliding, and guessing the rise instead of measuring it.
Rising rhythm is the exploratory template: five level frames on a centre line climbing 25 inches over 50 inches of run, roughly 1:2. For a real staircase, use the dedicated measured tool instead, which takes rise, run and ascent direction and warns when a custom baseline drifts from the measured pitch or the sequence runs past the measured rise.
Column and stack
A column needs two to four frames of the same width and one gap. It suits narrow piers beside doors and windows, alcoves flanking a chimney breast, and the awkward strip between two windows. It is the pattern to reach for when the usable width is under about 20 inches and every other arrangement would be forced.
There is no template for this one because it is quicker to build: place two frames, select both, align centres, then duplicate and distribute vertically. Its failure mode is drift, where the column is centred on the pier at the top but not at the bottom. Set the horizontal coordinate once and reuse the number for every frame in the stack.
Matching a layout to the wall you have
Compare bounding boxes to usable wall width, not to the wall as drawn on a plan. Width coverage is the arrangement bounding box divided by the wall width, and most successful arrangements land between roughly 50 and 75 percent of the usable wall. Below that the group looks marooned; above it the wall stops breathing and every edge distance becomes critical.
Add windows, doors, sockets and no-drill runs as obstacle rectangles before choosing. Fit checks flag frames crossing a wall edge, another frame, or a keep-clear zone, and constrained auto-fit will place the movable frames around whatever you have locked, reporting anything it cannot place instead of quietly dropping it.