Claude Styles
Claude Styles set tone, length, and formality across all your chats at once, use a preset or describe your own in plain English.
Styles change the voice, not the knowledge
Claude Styles control how Claude writes, its tone, length, and formality. They do not change what Claude knows or how it reasons; they change how it expresses the answer.
The Claude app comes with a set of preset styles, options like a more concise mode or a more formal mode, and lets you define a custom style using plain English. For example: "Write like a direct executive, short paragraphs, no filler, end with a clear action." You can switch styles at any time. Style availability may depend on your plan; check the Styles menu in the Claude app sidebar.
Styles are separate from your Project Instructions. A style applies across the whole Claude app, not just one Project. If you open a Project that has its own instructions and you have a style active, both are in effect: the style shapes how Claude writes, and the Project Instructions shape the role and the rules.
Give me three ways to improve this week's email open rate.
Here are three ways to improve your email open rate this week: 1. Test a different subject line. Subject lines have a significant impact on whether people open your emails, try a question or a specific number to draw curiosity. 2. Check your send time. Timing can affect open rates meaningfully; many audiences respond better to emails sent on Tuesday or Wednesday morning. 3. Segment your list. Sending to a smaller, more targeted group tends to improve relevance and, with it, open rates.
Give me three ways to improve this week's email open rate.
Three levers this week: 1. Rewrite the subject line, test a question or a specific number ("3 things you missed"). 2. Move the send time, try Tuesday or Wednesday, 8–10 AM. 3. Narrow the segment, email the 20% who opened last time before blasting the full list. Start with subject line; it has the fastest feedback loop.
Pick a Style, watch the answer change
Same question, same knowledge, different voice. Choose a Style below and see how it reshapes the same answer, tone, length, and formality change; the underlying facts don't.
Default optimizes for: A balanced, general-purpose answer, some explanation, no strict length limit.
Give me three ways to improve this week's email open rate.
Here are three ways to improve your email open rate this week: 1. Test a different subject line. Subject lines have a significant impact on whether people open your emails, try a question or a specific number to draw curiosity. 2. Check your send time. Timing can affect open rates meaningfully; many audiences respond better to emails sent on Tuesday or Wednesday morning. 3. Segment your list. Sending to a smaller, more targeted group tends to improve relevance and, with it, open rates.
Question 1 of 4
What does a Claude Style control?