> For the complete documentation index, see [llms.txt](https://docs.optionomega.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.optionomega.com/modeling/setup-and-use.md).
# Setup and Use
The modeling tool is intuitive by design and allows users to save, modify, and track trades throughout the life of the trade. [Here is a video covering the basic functions](https://youtu.be/OHAX2HuH-ig).
To start, navigate to **Model** at the top of the site and select either **Model** for saved models or **Create New Model**.
It’s easy to create a new model. Let’s use a call debit spread with one long call and one short call. Simply left-click **Mid (Buy)** to add the long call leg.
Then left-click **Mid (Sell)** to add the short call leg.
You will see the legs added to the chain and listed on the right. To view the trade visually, click **View Chart** on the right or **Chart** at the top.
Greeks can be added at the top right. Let’s add Delta and Charm.
Users can click **3D** to model in three dimensions.
Greeks are also displayed along the bottom of the screen.
If the user selects **2D**, they can adjust the time, range, and IV of the model.
To save the model, click **Save**.
Users can change the pricing, give the model a name and description, and choose to enable sharing if they want to share the model with a friend.
Saved models will now appear under the **Model** page.
That’s the basics. We’ll continue adding more modeling documentation over time.
