You can add an outline to foreground layers on batch images. Typically, outlines are used to:
Make the subject stand out against a busy or similarly colored background
Give the subject a classic die-cut sticker look.
Steps (Web App)
To apply an outline:
Select a foreground layer on the batch image you want to edit.
Select the More actions option ( ... ) and then Outline.
Use the Outline settings to change the outline's appearance:
Width
Use to control the thickness of the outline.
Blur
Use to make the edge of the outline appear sharper or softer.
Color
Use the color selector to change the color of the outline. For more details, see Color selectors (Web App).
[Optional] To apply the same effect to other images in the batch, use Apply to all or Copy/Paste edits.
For more details, see:[Optional] Use the editor to make further changes, such as add text, graphics, or shapes.
Note: To turn off the outline effect, select the Remove option in the Outline settings.


