> ## Documentation Index
> Fetch the complete documentation index at: https://docs.tenderly.co/llms.txt
> Use this file to discover all available pages before exploring further.

# Simulation Mode in the Explorer

> How the Explorer behaves when Simulation Mode is active, where to enter it from Explorer pages, and where the full Simulation Mode documentation lives.

Simulation Mode is a persistent "act-as-this-wallet" context. When it is active, Explorer pages render and simulate as the impersonated wallet: contract Read/Write pages auto-fill the `From` address, wallet pages expose one-click impersonation, and transaction pages let you re-simulate as that wallet.

This page covers the Explorer surfaces wired into Simulation Mode. For the session model, balance overrides, state settings, and the Sim Mode panel itself, see the full [Simulation Mode](/simulator-ui/simulation-mode) documentation.

## Entering Simulation Mode from the Explorer

There are two entry points:

* **Top bar**: click **Enter Simulation Mode** and pick a wallet and network. The button is available on every Explorer page.
* **Wallet detail pages**: an **Impersonate** button sits between Create Alert and Simulate. It activates Simulation Mode pre-filled with that wallet, with no picker step.

Once active, the top-bar button is replaced with a `SIMULATING` pill showing the wallet's identity icon, abbreviated address, and total USD balance. The context follows you across pages until you exit.

## Explorer surfaces wired into Simulation Mode

| Surface                       | Behavior when Sim Mode is active                                                                                                                                                |
| ----------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| **Contract Read/Write pages** | A purple banner indicates Sim Mode is active. The Write button is hidden and **Simulate** becomes the primary action. The `From` field auto-fills with the impersonated wallet. |
| **Transaction detail**        | The Re-Simulate dropdown gains a **Re-simulate as \[wallet]** option, so you can replay any transaction as the impersonated wallet.                                             |
| **Wallet detail pages**       | The **Impersonate** button activates Sim Mode for that wallet directly.                                                                                                         |

If you open a page on a network different from your active session, a banner offers a one-click **Switch Sim Mode to \[network]**. Read and Write actions are disabled until you switch.

## Relation to the Simulator

Simulation Mode and the [Simulator](/simulator-ui/overview) are complementary:

* **Simulation Mode** is a session: simulations accumulate, each run sees the state the previous ones produced, and the wallet context persists across Explorer pages.
* The **Simulator** is where you build and run individual simulations and multi-step bundles. With Sim Mode active, the Simulator pre-fills the sender as the impersonated wallet and successful runs append to the session log.

## See also

* [Simulation Mode](/simulator-ui/simulation-mode): the full session model, Tokens tab, balance overrides, and state settings.
* [Simulator UI](/simulator-ui/overview): single simulations and bundles.
* [Wallets in the Explorer](/developer-explorer/wallets): adding and managing wallets.