People spend most of their time on other products, so they expect yours to work the way those do.
LAW·003Law · Conventions
Tag3 entries across 2 sections
conventions
Entries tagged conventions, drawn from across the library. Tags cut through the section structure, which is where most of the useful connections are.
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3 entries
The same thing should look and behave the same way everywhere, and follow platform convention where one exists.
HEUR·004Heuristic · Nielsen heuristics
Study how others solved the same problem to learn the conventions your users already hold, not to assemble a feature list.
RES·019Research method · Evaluative