"The main scientific objection to evolution is not about the whether change occurs through time, and neither is it about the size of the change (so use of the terms 'micro-' and 'macro-evolution' should be discouraged). It isn't even about whether natural selection happens. The key issue is the type of change required - to change microbes into men requires changes that increase the genetic information content. The three billion DNA 'letters' stored in each human nucleus convey a great deal more information than the half a million DNA 'letters' of the simplest self-reproducing organism... all the alleged 'proofs of evolution in action' to date do not show functional new information added to the genes. Rather, they involve sorting and/or loss of information." - Jonathon Sarfati
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That is a misunderstanding of what information is (probably due to an equivocation of the physical and colloquial meanings of the word). Classical information is some particular arrangement of the elements of a system. The amount of information a system can represent is the number of different ways its elements can be arranged (including the various states those elements can be in).
Particular information can be meaningful in particular contexts. Colloquially, we tend to only use the word for information we find meaningful - but since meaning is contextual and a matter of interpretation, this leads to confusion about what is and isn't information. For example, the features of a natural landscape contain quite different meaningful information for a geologist and an artist. A written text has different information for someone who knows the language, a graphologist, a statistician, and a materials scientist.
With respect to DNA, new information appears every time a rearrangement of the bases occurs, e.g. a mutation. Sometimes this new information is functional in the context of cell activity, e.g. it can be transcribed into a novel protein sequence, or modifies the regulatory area of the genome; and sometimes it isn't functional, e.g. a change in some non-coding, non-regulatory area that has no effect at all. [note - I'm using a broad sense of 'functional' here, to mean. 'has some effect']
Of the new functional information, some will be detrimental to cell activity, some neutral, and some beneficial.
Some mutations involve the duplication of chunks of DNA, from tiny pieces to whole chromosomes. In these cases, the new information doesn't just replace what was there before, but adds to the information capacity of the genome.