For your Telegram application, you can use a custom logo on the launch screen. Figure 1 shows the default option.
Figure 1. Default logo when launching the app.
Logo Setup
To change it to your business logo or any image you prefer, follow these steps:
Open @BotFather in Telegram.
Select “Edit your bots”.
Choose the bot you want to update the logo for.
Then select “Bot Settings”.
After that, choose “Configure Mini App”.
Click on “Configure Splash Screen”.
Send your logo image in the chat with @BotFather.
It will then ask you to set up a couple of colors — we recommend pressing /skip both times. Later, we’ll share examples of how these colors can be customized.
Done!
Now, when your app loads, your custom logo will be used. Figure 2 shows an example after applying the settings above.
Figure 2. Your business logo when opening the app.
Logo requirements
The logo must be in SVG format, 512x512 pixels, and no larger than 1024 bytes. WEBP or TGS formats are also supported.
When you send your logo to @BotFather, if there’s an error, it will specify what went wrong.