Use the Lasso tool to draw around and select whatever object you would like to edit, to move, resize, or delete objects.
Three other cool features are Ink to Text, Ink to Shape, and Ink to Math. Here’s where you can draw a letter, select it with the Lasso tool, then click on Ink to Text to convert your hand-drawn lines to text.
Same goes with the Ink to Shape. Draw a shape, select it with the Lasso tool, click on Ink to Shape and it will convert your hand-drawn object into a shape.
Draw an equation on your slide, select it with the Lasso tool, click on Ink to Math, and your equation is converted to math text.