You can convert a painted image into a sticker.
Click the Selection tool on the tool palette.
You will see the Selection Options panel.
Click the Rectangle tool.
Click and drag on the page to select an area.
Click the Convert to Sticker button on the options panel.
You will see the Selection Options panel.
Click the Rectangle tool.
Click and drag on the page to select an area.
Click the Convert to Sticker button on the options panel.