Comparing bugs and feature requests
Often, there is a gray area between a bug and a feature request, especially in user interface design. For example, old feature A works, and new feature B works, but you can’t use features A and B together. Whether that is a bug or a feature depends on your users’ expectations – would they think those features should work together? This is context-dependent and may require usability studies to figure out.
As a tester, you can discover and highlight these limitations. In a mature product, interactions between features may not be apparent and might have been missing from the specification. They will require knowledge and imagination to find whether you are using automated or manual testing.
In terms of wording, spelling and grammar mistakes are bugs; improving the phrasing is a feature request. Text wrapping awkwardly is a feature request, but having it overlap and become unreadable is a bug. Improving hard-to-find elements...