> For the complete documentation index, see [llms.txt](https://penida.gitbook.io/cowlendar-help/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://penida.gitbook.io/cowlendar-help/how-to.../how-to-change-the-duration-of-a-booking-for-a-custom-one-i.e-15min.md).
# How to change the duration of a booking for a custom one? (i.e 15min)
{% hint style="warning" %}
**This is a Premium feature of Cowlendar.** You need to upgrade your plan if you want to use this feature and you are a free user of Cowlendar.
{% endhint %}
### **Steps to change the duration of a booking to a custom one**
1. In your Shopify admin dashboard look at the left panel and click on the **Apps**
2. Click on **Cowlendar**
3. Click on **My Service**
4. Click **Edit** on the service you want to add a custom meeting duration
5. Click on the **Availability** tab
5. Scroll down to where it says **Meeting duration**
6. Click on an **empty box**
7. Click directly **on the number** to change it
8. Click **update** before leaving :innocent:
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