To create a stack:
- From Affinity Photo's Home screen, tap the plus icon.
- Choose New Stack.
- From the dialog, tap either the Cloud or Photos icon to locate your images (raw images can be used).
- (Optional) If you are using Photos to import images, tap Select at the top right to enable multiple selections. This means you can quickly select multiple images and add them all at once.
- Check Align source images if your images were shot handheld, or if there is a slight variance in positioning between images.
- Toggle Perspective alignment to align images using perspective operations instead of rotation, translation and scaling. Perspective alignment may result in slightly more edge detail.
- Toggle Live alignment to allow the above alignment to be made non-destructively (this may affect performance depending on size and number of images to be stacked).
- Choose OK.
Your images are blended and presented in a Live Stack Group in the Layers Studio. You can manually align layers if auto-alignment isn't 100% accurate.
To change stack operator:
- On the Layers Studio, you can find the stack operator on the layer properties dialog. The default operator is Median.
- From the pop-up menu, select a stack operator suited to the type of photos you are stacking (see above). The icon will change depending on the operator selected.