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Photo Sketching
Photo sketches can be used to annotate photos or pictures added to a feature, in addition to the regular field collection of features or photos.
Preview feature
Photo sketching is a feature in preview. While it works for most devices and setups, you may encounter some issues.
Enable photo sketching
Since QGIS plugin 2025.3.4Photo sketching is disabled by default. To use it, it needs to be enabled in QGIS when preparing your Mergin Maps project.
Open your Mergin Maps project in QGIS
Navigate to Project > Properties

In the Mergin Maps tab, check the Enable photo sketching option and Apply the changes.

Save and synchronise your project!
TIP
If you do not see this option in the Project properties, check for plugin upgrades.
Photo sketching in the mobile app
To use photo sketching in the mobile app, make sure it is enabled in the project.
Open a form with a photo widget for editing and tap the Photo sketching button.
- Draw your sketches on the photo by freehand or using a stylus. You choose from 7 annotation colours.
- Use the Undo button to revert the last changes.

Use the Done button to finish sketching. The picture with sketches will be displayed in the form.
Save and synchronise the changes. A copy of the original picture with the sketches will be saved to Mergin Maps.