A picture, at some point just want to highlight a part of it, how to achieve it? There are many seemingly methods, this example for you to introduce the use of transparent mask approach, the principle is color fill, set the transparency and then cover do not need to highlight the part. Interested friends can try to operate, may be harvested.
Insert a picture after inserting a rectangle shape, and color fill it, choose No outline to let it have a frame, and the transparency of 33%, the other side is the same cover, copy and paste, and finally the picture for local transparent coverage.
Start PowerPoint2010, and after inserting the picture, continue inserting a rectangular shape.
Draw the rectangle and cover the left side of the picture, as shown, click the Shape Fill button to select a color fill.
Click on the shape outline, select No outline, so you can cancel the rectangle outside the wireframe.
Then select a different color fill in the shape fill.
From the pop-up interface, adjust the opacity to 33%, OK. The other side is also the same overlay, copy and paste can be.
CTRL + A All selected graphics, right click, select Combination--combination.
Finally, we cover the picture in a partial transparent manner.