How to make a photo collage that looks designed instead of assembled

Decide grid or freeform before you pick a single photo

A grid collage is built from repeating rectangles with straight edges and shared alignment. It reads as a set, it holds a lot of photos without getting noisy, and it forgives mismatched colour because the structure carries the composition. A freeform collage is the opposite: photos overlap and tilt, and the negative space between them is part of the picture. It reads as a scrapbook page rather than a catalogue.

Commit early, because the two need different photo sets. Grid rewards photos that already agree in tone and framing, since the eye compares neighbours directly. Freeform rewards photos that clash, because overlap and rotation turn the clash into texture. Starting a grid and then nudging one photo out of alignment because it did not fit is the most common way a collage ends up looking half finished.

The gutter is the design, and it has to be one number

A gutter is the gap between photos. The rule is boring and absolute: pick one gap and use it everywhere, including between the outer photos and the canvas edge. A collage where the inner gaps are 12 px and the outer margin is 30 px looks like a mistake even to people who cannot say why. A collage where every gap matches looks deliberate even when the photos are terrible.

In dump the built-in layouts do this for you: every layout in the gallery is built from one proportional gutter of roughly 1.2 percent of the canvas width, which is about 13 px on a 1080 wide canvas. Because it is a fraction rather than a fixed pixel value, the rhythm survives if you later rebuild the same layout at a different size.

• Tight gutters (around 1 percent of canvas width) make the photos read as one object. Good for grids of related shots.
• Wide gutters (3 to 5 percent) make each photo read as its own framed print. Good for two or three strong images.
• Zero gutter is a real option, but only if you commit fully. Photos touching edge to edge is a look; photos touching in three places and gapping in one is not.
• Whatever you pick, match the outer margin to the inner gap. That single move does more for a collage than any filter.

One photo has to be bigger than the rest

An even grid of six equal squares is a contact sheet: a fine way to review photos and a weak way to present them, because nothing tells the viewer where to start. Give one photo roughly twice the area of its neighbours and the whole thing snaps into place. The eye lands on the big one, then walks the small ones as supporting detail. This is why several layouts in dump's gallery are asymmetric by default, with entries like two small squares above a wide hero, or one hero above a pair.

Pick the lead photo on carrying power, not on which one you like most. The lead needs a clear subject and enough contrast to survive being seen at thumbnail size in a feed. Detail shots, textures and near duplicates belong in the small slots, where their job is rhythm rather than information.

The background is a choice, not a default

Every canvas in dump carries its own background colour, so a two page project can have a white sheet and a black sheet without any workaround. Four choices cover almost everything worth doing:

• White or near white: the gallery default. It disappears, which is the point, and it makes darker photos look richer than they are.
• Near black rather than pure black: pure black eats the edges of dark photos. A very dark grey keeps the frames readable.
• A colour pulled from the photos themselves: sample a muted tone that already appears in two or three of the images. It ties the set together without anyone noticing why.
• Transparent: useful when the collage will be dropped onto something else later, like a story background or a printed page.

Building it, start to finish

1. 1
   Start from a layout instead of a blank canvas

   The layout gallery has the useful shapes already built: single, split vertical, split horizontal, two above one, one above two, a 2 by 2 grid, a three row strip and a 2 by 3 grid. Each one arrives with its photo slots and its gutter already correct, which removes the part people get wrong.

2. 2
   Drop photos into the slots

   Each slot is a frame that crops the photo to fit, so you can reposition and scale the image inside the frame without moving the frame itself. That is what keeps the grid aligned while you fine tune what is actually inside each rectangle.

3. 3
   Turn on a guide overlay while you place things

   Every canvas can show its own overlay: rule of thirds, an even grid of columns and rows, or columns only. It is a working aid, not a layer, so it never appears in the export.

4. 4
   Add one layer of detail, then stop

   Stickers, a short text line, a filter. dump ships sticker packs you can browse for free, plus filter styles in the Filters panel where some styles are premium. If a photo needs its background removed to sit cleanly on the canvas, background removal runs 15 times a week on a free account and without limit on premium.

5. 5
   Export at the size the destination wants

   Pick the format first, then the resolution. PNG keeps transparency, JPG makes a smaller file, PDF is for print. Resolution is SD without an account, HD at the canvas's native size with a free account, and 2K or 4K on premium.

Export size, decided by where it is going

The single most common way a good collage gets ruined is being built at the wrong shape and then cropped by the platform. Choose the canvas at the start, not at the end. dump's presets cover the destinations most collages are headed for: a square post at 1080 by 1080, a portrait post at 1080 by 1440, a story at 1080 by 1920, a Pinterest pin at 1000 by 1500, a moodboard at 1600 by 2000, and a phone wallpaper at 1290 by 2796.

For anything going on a feed, portrait beats square, because a taller image simply occupies more of the screen as someone scrolls past. For anything going to print, build bigger than you think and export as PDF. For anything being reused inside another design, export PNG at native size and keep the file.

One thing you never have to plan around: the output is clean on every tier. There is no watermark on a free export, an anonymous export or a premium export. Storage differs, 1 GB free and 10 GB on premium, but the exported image itself is never marked.

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