Importing files and editing png, def,exc

I have imported a png file and i want to edit it. How do i do this

You can change the size of the image during import to a specific size or later scale it with Transform/Scale tool. To change the opacity of the image, go to items menu and change the opacity value.

What I’m trying to do is create the image in 3D so i can use it

Within the app, 3d models can be generated only from closed sketches. You can use the imported image as a sketch tracing outline and afterward generate the 3d model from the sketch.
Here’s a short video on generating a model from an imported image traced sketch:

Thanks a lot guys