There's another way too.
Make a new layer.Use the selection tool (rectangle), choose the part of the siggy that you want to be LEFT out from the boder. Like for eg. i leave pixles from the top and pixles from the bottom and make the selection. Then left click on it and select 'select inverse'.Then choose the colour fill tool and the colour you want in your border and fill it. Then again choose the selection tool>>right click>>deselect.Hope it helps!😊
u can do like this also completely forgotten😆
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