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an image that is not rectangular can be filled to the required rectangle using transparent surroundings; the image can even have holes (e.g. be ring-shaped) in a run of text, a special symbol for which an image is used because it is not available in the character set, can be given a transparent background, resulting in a matching background.
Corel Presentations can create effective and in-depth presentations. This program includes a number of templates and different types of slide shows to help to lay out a show. The templates include a set background, font, color and set up of the slide. These defaults can be changed within the slide show.
Efficiency: any progressive image presentation, compression and filtering seeks efficient decoding and presentation. Compression: images can be compressed efficiently and consistently. Easiness: the implementation of the standard is easy. Interchangeability: any PNG decoder that follows the standards can read all PNG data streams.
Content such as text, images, links, and effects are added into each of the presentation programs to deliver useful, consolidated information to a group. Visual elements add to the effectiveness of a presentation and help emphasize the key points being made through the use of type, color, images/videos, graphs, layout, and transitions.
Overhead projector in operation, with a transparency being flashed. A transparency, also known variously as a viewfoil or foil (from the French word "feuille" or sheet), or viewgraph, is a thin sheet of transparent flexible material, typically polyester (historically cellulose acetate), onto which figures can be drawn.
Perry performing an acoustic version of "Thinking of You" during her Witness: The Tour in October 2017.. The song has received some retrospective praise, with Christopher Rosa of Glamour calling it a "fan favorite" and described it as her most emotional song compared to others in her discography, adding that it is "one of Perry's rawest vocal performances, but [the] chorus still packs a punch."
In software engineering, it is also considered good practice to develop or use abstraction layers for database access, so that the same application will work with different databases; here, the abstraction layer allows other parts of the program to access the database transparently (see Data Access Object, for example).