If you find yourself repeatedly telling ChatGPT to 'keep it brief,' 'act as a senior developer,' or 'avoid corporate jargon,' you are wasting valuable time. ChatGPT's Custom Instructions feature allows you to set permanent preferences so the AI remembers your context, goals, and preferred tone in every new conversation.

This guide will show you how to configure Custom Instructions to eliminate repetitive prompting and significantly boost your daily productivity.

Step 1: Accessing Custom Instructions in ChatGPT

To begin, you need to locate the settings menu. Custom Instructions are available to both Free and Plus users on web and mobile versions.

• On Desktop: Click on your profile name or icon in the bottom-left (or top-right) corner of the screen and select Custom instructions.
• On Mobile: Tap the two lines to open the sidebar, tap the three dots next to your name, and select Custom Instructions.

Step 2: Define Your Persona (The 'Who Are You?' Section)

The first box asks: "What would you like ChatGPT to know about you to provide better responses?" This is where you provide context about your role and background.

For maximum efficiency, include the following details:

• Your Profession: e.g., "I am a Full-Stack Developer specializing in React and Node.js."
• Your Goals: e.g., "I use AI to brainstorm marketing copy and optimize SEO strategies."
• Relevant Skills: e.g., "I have an intermediate understanding of Python but am a beginner in Rust."
• Location/Context: e.g., "I am based in the UK, so use British English spelling and metrics."

Step 3: Set Your Output Preferences (The 'How to Respond?' Section)

The second box asks: "How would you like ChatGPT to respond?" This section controls the formatting and style of the AI's output.

To get the best results, use these SEO-friendly formatting tips:

• Tone: Use descriptors like "Professional yet conversational," "Highly technical," or "Fact-focused and minimalist."
• Response Length: Specify if you prefer concise bullet points or long-form detailed explanations.
• Formatting: Request the use of Markdown, bold headers, or tables for data-heavy replies.
• Refusal Style: Tell the AI how to handle uncertainty. For example: "If you don't know the answer, state that you are unsure rather than guessing."

Step 4: Use a Proven Custom Instruction Template

If you aren't sure what to write, try this high-productivity template for the response section:

"Always provide actionable advice. Use bold text for key terms. If I ask for code, provide the full script with comments. Avoid flowery introductions like 'Sure, I can help with that.' Get straight to the point."

Step 5: Save and Toggle the Feature

Once you have filled out both sections, ensure the 'Enable for new chats' toggle is switched on. Click Save. From this point forward, every new chat session will automatically apply these rules without you having to type them again.

Step 6: Testing and Iterating

Custom Instructions are not permanent. If you find that ChatGPT is becoming too brief or too technical, go back into the settings and refine your requirements. Professional prompt engineers often update their instructions weekly as their project needs change.

Pro Tip: If you are working on a specific one-off task that contradicts your instructions, you don't need to delete them. Simply tell ChatGPT in the chat: "Ignore my custom instructions for this specific prompt," and it will revert to its default behavior.

💡 Pro Tip: Keep your software updated to avoid these issues in the future.