SizeLeafA good first print.
A few small settings make a big difference. This guide covers the SizeLeaf web editor and native app.
Follow the web tutorial or the app tutorial on YouTube. Both include English captions and step-by-step instructions.
Create a sheet on your computer
Open the desktop web editor in a browser window at least 1,024 pixels wide. Phones and tablets should use the native SizeLeaf app. A narrower desktop window shows a resize message and keeps your open project in memory.
Add JPEG, PNG or WebP photos, set their exact size and copies, and choose your paper. Crop & rotate lets you adjust what appears in each print. Photos are arranged in order across as many sheets as needed. The optional check line is about 1.969 in (50 mm) long and reserves 0.394 in (10 mm) below the photos. Download a PDF, open it in your PDF viewer and print at Actual size or 100%.
Use Save project before leaving to download a .sizeleaf-web.json file containing the photos and settings. Use Open project to return to it in this editor. Browser projects do not open in the native app. There is no automatic browser save or cloud sync. Up to 40 photos and 200 copies fit in one project; each photo must be under 25 MB. Convert HEIC photos to JPEG before importing. Large photos may be reduced to 24 megapixels to keep the browser responsive.
Keep your photos at the size you chose
- In Paper & spacing, choose the paper actually loaded in your printer. Use the same paper size when printing.
- Select a photo to set its width and height. Inches are the default in the web editor, with metric equivalents shown alongside. You can also enter centimeters or millimeters. In the native app, “Keep original shape” changes both dimensions together.
- Choose Download PDF on the website, or open Preview & print in the app. In your printer or PDF viewer, choose Actual size or 100%. Disable “Fit to page”, “Shrink” and any automatic enlargement.
- Print one test sheet on ordinary paper. Measure a photo with a ruler before using your photo paper.
Some mobile printer dialogs do not expose scaling controls. If yours does not, save the PDF and print it from a computer or a printer app that offers actual-size printing.
A print came out too small or too large
Check the PDF viewer and printer scaling first. Borderless printing can enlarge an image beyond the paper edges. Choose a normal paper mode with margins where possible. In SizeLeaf, turn on Add a print check line in the web editor’s Paper controls. It should measure about 1.969 inches (exactly 50 mm) on the printed sheet. The native app calls this “Add a 50 mm check mark.”
SizeLeaf controls dimensions in the PDF. Your printer, driver and paper settings control the physical output.
A photo does not fit
Choose larger paper, reduce the photo dimensions, or adjust your page margin and photo gap. Landscape paper may help. SizeLeaf can use more sheets without shrinking your photos. A printer may need a larger margin than the app default; check your printer’s printable area.
A photo looks soft
The resolution note in Photo size describes the pixels left after cropping. Use a higher-resolution original, reduce the print size, or zoom the crop out. Screenshots and images saved from messaging apps may have fewer pixels than the original photo. SizeLeaf does not invent missing detail.
Save, copy and recover a layout
In the native app, changes save on this device as you work. Open Your layouts to find a saved sheet. Its options let you make a copy or move it to Removed. Use the trash icon in the library to view removed layouts, then choose Restore layout. Nothing in Removed is deleted automatically.
“Delete forever” permanently removes that saved layout after confirmation. It does not delete the original photo from your device photo library.
Keep a backup before changing devices
In the native app’s editor menu, choose Save layout backup. Save the file outside SizeLeaf, somewhere you will still have access to after changing devices or removing the app. The backup includes the layout, imported originals and working photo copies. Open layout backup opens it as a separate layout, keeping existing layouts in place.
A PDF is for printing. A layout backup is for editing again. Keep both when the layout matters to you. Backup files contain your photos, so share them only with people you choose.
Accessibility in SizeLeaf
Use your device’s text-size and appearance settings to make SizeLeaf more comfortable to read. The app includes light and dark themes, labeled controls and a scrollable photo-size editor.
We tested opening a saved layout and reaching the print preview with TalkBack on Android, and the preview workflow with VoiceOver on iPhone. We also checked enlarged text in the editor and print preview.
If a control is difficult to read, hear or operate, email contact@sizeleaf.com with your device, accessibility settings and the step you were trying to complete. Your feedback helps us improve the next update.
Something else needs a hand
Email contact@sizeleaf.com with “SizeLeaf” in the subject. Include your device model, operating system version and the step that did not work. For print sizing, also include the printer model and paper size.
Please leave private photos and personal information out of screenshots unless they are necessary to explain the issue.