How can I cut off part of an object?

I imported a picture and want to take away part of it. How can I cut part of it off?

Draw a rectangle (or other shape) over the undesired part, select the picture and the shape, choose menu Shape - Subtract.

If you want to add more information, you can edit your question; also can comment an answer. Do not use Answer to comment.

Mark the circle to the left of the answer that solves your question.

For more Help, see Combining Objects and Constructing Shapes.

In addition to @LeroyG, Merging, subtracting, and cutting objects

Thank you both.