> For the complete documentation index, see [llms.txt](https://doc.sysdevmobile.com/mss-extensibility/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.sysdevmobile.com/mss-extensibility/mss-5.1/functions-mss-to-kalipso/sales/510-sales-quantity-screen.md).

# 510 - Quantity screen

510 - Quantity screen

{% hint style="info" %}
Please check the page “[Quantity Screen](/mss-extensibility/mss-5.1/functions-mss-to-kalipso/quantity-screen.md)” for detailed information
{% endhint %}

| Event   | Extension action set  | Description                                           |
| ------- | --------------------- | ----------------------------------------------------- |
| Before  | EXT\_0510\_1\_Before  | Will be executed before MSS open the quantity screen; |
| Replace | EXT\_0510\_2\_Replace | Will replace MSS quantity screen;                     |
| After   | EXT\_0510\_3\_After   | Will be executed after closing the quantity screen;   |