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Every piece of content on your canvas is a card. When you add a PDF, embed a YouTube video, or write a note, it becomes a card that you can drag, resize, and arrange. Cards are the things you work with — you select them to give the AI context, organize them into folders, and generate new cards from AI responses.

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Card types

ThinkEx supports nine types of cards, each designed for a specific kind of content.
Upload a PDF file. ThinkEx displays the document with page navigation and built-in highlighting. PDF text is extracted so the AI can reason over the content when you select the card. Large PDFs are processed in the background — you’ll see a status indicator while extraction is in progress.
A Markdown-based note you write directly in ThinkEx, or one generated by the AI from your chat. Documents are the most common output of AI interactions — when you ask the AI to summarize, research, or draft content, it creates a document card in your workspace.
A set of flashcards with a front and back for each card. You can create flashcard decks manually or ask the AI to generate them from any content in your workspace. ThinkEx tracks your position in the deck so you can resume where you left off.
A multiple-choice or true/false quiz. Quizzes can contain hints and explanations for each question. Like flashcard decks, quizzes can be created manually or generated by the AI. Your session state — current question, answers, and score — is saved so you can pause and return.
Paste a YouTube URL to embed the video directly on your canvas. The video plays in place, and transcript-backed context is available for the AI when you select the card. Playback position and speed are saved automatically.
Upload an image file. ThinkEx can extract text from images using OCR, making the content available to the AI. You can also add an optional caption and alt text.
Upload an audio file for transcription. ThinkEx processes the file to produce a full transcript and timestamped speaker segments, which the AI can reason over. A summary of the audio is also generated during processing.
Paste a URL to embed a web page as a card. The favicon is displayed for quick identification. Use this card type to keep a reference page visible alongside your notes and sources.
A container for organizing other cards. Folders appear on the canvas like any other card. Drag cards into a folder to group them, and open the folder to work within it. Each card belongs to at most one folder — the structure is flat, not hierarchical.

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Card properties

Every card has a set of properties you can edit directly on the canvas.
PropertyDescription
NameThe title displayed at the top of the card.
SubtitleA secondary label shown below the title. Useful for brief descriptions or source attribution.
ColorA background color accent chosen from a palette of 90 colors. Colors help you visually distinguish cards on a dense canvas.
PositionWhere the card sits on the canvas grid. Drag to reposition; resize using any edge or corner handle.

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Organizing cards into folders

Folders let you group related cards without removing them from the workspace.
1

Create a folder

Click Add card and choose Folder, or drag an existing card onto another card to prompt grouping.
2

Add cards to the folder

Drag any card and drop it onto a folder card. The card moves inside the folder. You can also move cards from the card’s context menu.
3

Open the folder

Click the folder card to open it. The canvas switches to show the folder’s contents. Use the breadcrumb navigation at the top to return to the parent level.
Selecting a folder card in the AI context does not automatically include the cards inside it. Select individual cards within the folder to include their content.