Google Gemini API Setup Guide (for the AI Presentation Theme Generator)

Arun Nagarathanam ยท 10 Jul 2026 ยท Guide ยท 16 of 16 in this course

An exclusive resource for students of Arun's AI PowerPoint Course.

๐Ÿ“Œ Step-by-Step Instructions

Step 1: Open the Theme Generator

Step 2: Open the Settings Panel

  • Click the gear icon (top-right corner).
  • This opens the API Key settings.
Theme Generator settings panel showing the gear icon and API key field

Step 3: When You Click "Generate Themes" Without a Key

  • If no API key is saved, you will see a message stating:

"API Key Required โ€” Please add your Google Gemini API key to start generating themes."

  • This is normal, proceed to create your own API key.
"API Key Required" message shown when generating themes without a saved key

Step 4: Visit Google AI Studio

  • Go to Google AI Studio (https://studio.google.ai).
  • Sign in with your Google account.

Step 5: Create Your Free Gemini API Key

  • Click Create API Key.
  • A popup titled "Create a new key" will appear.
"Create a new key" popup in Google AI Studio

๐Ÿ“Œ Step 6: Follow These Required Steps Inside Google AI Studio (Important!)

Select or create a project

  1. Click the dropdown under Choose an imported project.
  2. Select Create project.
  3. Enter a project name (e.g., aruntastic labs).
  4. Click Create project.

Now the new project will appear in the dropdown.

Create the API key

  • After selecting the project
  • Enter a name (e.g., AI Presentation Theme Generator).
  • Click Create key.

Your API key is displayed

  • Google AI Studio will show the newly generated API key.
  • Copy it securely.
  • Keys often start with AIzaSyโ€ฆ
Newly generated Gemini API key displayed in Google AI Studio

Step 7: Add the API Key to the Theme Generator

  1. Return to the Theme Generator's Settings.
  2. Paste the API key into the field provided.
  3. Click Save API Key.

The key is stored locally in your browser, not sent to any server.

Step 8: Generate Themes

  • Go back to the main screen.
  • Click Generate Themes again.
  • Your custom themes should now be created successfully.

๐Ÿ“Œ Important Notes

  • Free Tier Limits (Gemini 2.5 Flash)
    • 10 requests/minute
    • 250 requests/day
    • 250k tokens/minute
  • Limits reset daily at midnight Pacific Time.
  • If you need more capacity, you can upgrade in Google Cloud Console.

๐Ÿ“Œ Troubleshooting

  • If the key does not work, re-paste and save it again.
  • Ensure there are no extra spaces before or after the key.
  • If the system says quota exceeded, wait for the daily reset.
  • If you exposed your key publicly, delete it in Google AI Studio and create a new one.

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