To start editing your image in the template editor, add an image block to your template.

Then click the Upload Image button and select your image, then click Apply Effects & More button to start editing your image.

Edit your image
The image editor includes the following edits you can make to your image:

Apply filters (black & white, grayscale, sepia, blur, etc.)
Resize and crop
Transform and rotate
Add text, draw, stickers and shapes
Add a frame
Round the corners
Add a background colour
Merge images together